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Final Exam
Penn State Bio 110
375
Biology
Undergraduate 1
12/14/2010

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Term
alelle
Definition
alternative form of genes; result in slightly different proteins and enzymes
Term
asexual reproduction
Definition
individuals produce genetically identical offspring (clones)
Term
autosomes
Definition
chromosomes that aren't sex chromosomes (pairs 1-22)
Term
chromosome
Definition
organized structure of DNA and protein thats found in cells
Term
crossing over
Definition
exchange of genetic materials between homologous chromosomes (Prophase I of meiosis); pieces of one chromosome may be exchanged with the identical portion of the other chromosome
Term
diploid (somatic) cell
Definition
2n; has two homologous copies of each chromosome
Term
gamete
Definition
reproductive cell (sperm and egg)
Term
genes
Definition
heritable unit (occupies specific positions on the chromosomes)
Term
haploid cell
Definition
1n; "split diploid"; has one complete set of chromosomes
Term
homologous chromosomes
Definition
chromosomes that belong to the same pair (might not have the same alelle!)
Term
independent assortment
Definition
alleles of different genes assort independently of one another during gamete formation; Metaphase I
Term
life cycle
Definition
period involving all different generations succeeding eachother through reproduction
Term
locus
Definition
the specific location of a gene or DNA on a chromosome
Term
meiosis
Definition
cell division of a diploid into 4 haploid cells, which develop to produce gametes
Term
sexual reproduction
Definition
genetic materials from two parents combine to form offspring that are genetically distinct from their parents and siblings
Term
zygote
Definition
cell formed by sexual reproduction
Term
character
Definition
heritable feature for which variants exist
Term
dominant trait
Definition
trait expressed over another trait
Term
dominant alelle
Definition
gene that's expressed
Term
F1 generation
Definition
crossing of 2 true-breeding parents
Term
F2 generation
Definition
when F1 hybrids were self-pollinated
Term
genotype
Definition
genetic makeup for a particular trait
Term
heterozygous
Definition
2 different alleles, same gene (Rr)
Term
homozygous
Definition
2 identical alleles on the same gene
Term
Mendelian trait
Definition
traits with dominant/recessive expression patterns
Term
P generation
Definition
parental generation
Term
phenotype
Definition
organism's appearance; traits produced by the alleles at the location for the trait
Term
recessive trait
Definition
masked trait; receded in previous generation
Term
recessive allele
Definition
only expressed if there are two of them
Term
self-fertilization
Definition
"selfing"
Term
trait
Definition
a particular variant for the character
Term
true breeding
Definition
all the offspring of an individual have the same trait as the parent when the offspring are produced by "selfing"
Term
dihybrid cross
Definition
crossing traits with 2 alleles each
Term
hybrid
Definition
offspring of 2 crossed individuals
Term
independent event
Definition
not affected by previous trials
Term
monohybrid cross
Definition
crossing of individuals and the examination of a single character in their offspring
Term
non-independent event
Definition
affected by previous trials (remove picked stuff)
Term
Punnett square
Definition
tool used to predict offspring involving Mendelian traits
Term
test cross
Definition
used to determine the genotype of an individual with a dominant trait (cross dominant with fully recessive)
Term
Rule of Multiplication
Definition
look at 2 separate events and multiply chances of first by chances of second to see the chances of them happening at the same time
Term
Rule of Addition
Definition
if something can happen in more than one way, add the chances of each event
Term
Law of Segregation happens in..
Law of Independent Assortment happens in..
Definition
meiosis I
meiosis
Term
blood groups
Definition
A, B, O, AB; example of codominance
Term
codominance
Definition
both alleles are expressed in the phenotype of individuals that have heterozygous alleles
Term
complete dominance
Definition
one allele is completely dominant over another
Term
discrete characters
Definition
can only be classified on "either or" basis
Term
epistasis
Definition
gene at one location on chromosome can affect the expression of gene at 2nd location (dependent; albino)
Term
incomplete dominance
Definition
heterozygous alleles have a phenotype intermediate between those with homozygous alleles (not one allele is completely dominant over another; pink/lavender)
Term
multiple allele trait
Definition
various codes for different alleles (example: ABO blood groups)
Term
pleiotropy
Definition
one gene can have multiple effects
Term
polygenic inheritance
Definition
characters are controlled by more than one gene
Term
quantitative character
Definition
expressed in "degrees"; gradient; skin color
Term
autosomal
Definition
not sex chromosomes
Term
carrier
Definition
heterozygote that possess a certain trait (can pass trait on)
Term
deletrious recessive allele
Definition
gene variant that causes side effects (diseased phenotype)
Term
pedigree
Definition
describe the inter-relationships between parents and children over generations regarding a specific trait
Term
Cystic Fibrosis (CF)
Definition
recessive; salt imbalance; mucous buildup; protects against typhoid if heterozygous
Term
Huntingdon's Disease (HD)
Definition
dominant; progressive damage to NS; uncontrollable movements, dementia; late onset
Term
Sickle-cell disease
Definition
recessive; hinders oxygen transport to RBC; anemia, pain, fever, fatigue; BEST example of natural selection in humans; heterozygous-malaria
Term
Phenylketonuriua (PKU)
Definition
recessive; mental retardation; symptoms can be prevented by proper diet; can be detected early
Term
barr body
Definition
dark region inside nucleus of female animal cell; inactive X chromosome
Term
haplo-diploid system
Definition
(bees & ants); females develop from fertilized eggs-2n; males develop from unfertilized eggs-1n
Term
hemizygous
Definition
for sex-linked genes; MALES have half as many ("hemi") alleles as a female
Term
mutant phenotype
Definition
not-typical/wild type; new phenotype due to mistake
Term
sex-linked genes
Definition
genes located on X & Y chromosomes
Term
wild type
Definition
typical form of a species
Term
XIST gene
Definition
gene for inactivation of X chromosome
Term
X-O system
Definition
some insects; F: XX; M:X (whether or not X is in sperm)
Term
X-Y system
Definition
humans; F: MM; M: XY (male determines)
Term
Z-W system
Definition
birds, insects, fish; sperm always contribute Z chromosome; M:ZZ ;F: ZX
Term
genetic map
Definition
shows arrangement of genes on a chromosome
Term
linkage map
Definition
portrays sequence of genes across a chromosome (sequence/order, not exact position)
Term
map units
Definition
1 map unit (1 mu=1% recombination frequency)
Term
nucleotides
Definition
nitrongenous bases in DNA strands
Term
parental types
Definition
inherited directly from parents
Term
recombinant
Definition
combine genetic material of 2 sources
Term
recombinant frequency
Definition
how often (%) 2 linked genes are separated by recombination
Term
if genes on the same chromosome are far apart, what is the maximum % for recombination frequency?
Definition
50%
Term
frequency
Definition
how often something happens
Term
gene flow
Definition
transfer of alleles from one population to another
Term
gene pool
Definition
complete set of unique alleles in a species or population
Term
Hardy-Weinberg equation
Definition
p^2+2pq+q^2=1
Term
monomorphic
Definition
NO variation between the members of a population; just one form exists
Term
"p"
Definition
wild type allele
Term
polymorphic
Definition
variation of members in a population; more than one form exists, can be extreme variation
Term
population
Definition
group of organisms that are the members of the same species and that live in the same geographical area
Term
"q"
Definition
mutant allele
Term
species
Definition
group of potentially interbreeding individuals that can produce fertile offspring
Term
range
Definition
the area a species occupies
Term
changes in allele frequencies
Definition
natural selection, small population size, migration/immigration, mutations, nonrandom matings
Term
assortative mating
Definition
when individuals choose mates that have some of the same phenotypic traits as themselves
Term
bottleneck effect
Definition
decimates a population and results in only a small fraction of the population surviving (earthquakes, fires, over-hunting)
Term
founder effect
Definition
when a few individuals become geographically from the original population and form a new colony
Term
genetic drift
Definition
random fluctuations of allele and genotype frequencies
Term
interbreeding
Definition
mating of closely related individuals
Term
macroevolution
Definition
evolutionary changes that mark the appearance of a NEW SPECIES
Term
microevolution
Definition
changes that lead to alterations in allele frequencies and genotype frequencies from generation to generation
Term
mutation
Definition
a change in an organism's DNA
Term
balancing selection
Definition
works to maintain dynamic state of balance between advantageous and disadvantageous alleles
Term
directional selection
Definition
favors individuals at one extreme/end of the phenotypic range
Term
diversifying selection
Definition
favors individuals at one extreme/end of the phenotypic range
Term
evolution
Definition
change of the inherited traits of a population of organisms through successive generations
Term
fitness
Definition
reproductive success (producing offspring); not longevity, just reproduction
Term
frequency-dependent selection
Definition
provides prey with ability to avoid being hunted, but predators also adapt
Term
heterozygous advantage
Definition
keeps allele in the population via balancing selection
Term
natural selection
Definition
"survival of the fittest"; how populations over time adapt to their environments
Term
sexual dimorphism
Definition
differences in secondary sex characteristics
Term
sexual selection
Definition
selection of mate based on a specific heritable trait; NOT a mode of natural selection
Term
stabilizing selection
Definition
favors intermediate variants by acting against extreme phenotypes
Term
adaptive radiation
Definition
relatively rapid evolution of many new species from a single common ancestor into diverse habitats
Term
allopatric speciation
Definition
occurs when populations become physically isolated due to a geographic barrier
Term
behavioral isolation
Definition
mating calls, etc.
Term
gametic isolation
Definition
gametes can't form zygote
Term
habitat isolation
Definition
different habitats
Term
hybrid
Definition
individual derived from 2 species
Term
hybrid breakdown
Definition
hybrids can reproduce, but their offspring have either reduced fertility or reduced viability
Term
mechanical isolation
Definition
genitalia don't "match up"
Term
reduced hybrid fertility
Definition
hybrids are sterile (mules)
Term
reduced hybrid viability
Definition
hybrids don't mature sexually, so cant reproduce
Term
reproductive isolation
Definition
prevents certain groups from mating
Term
speciation
Definition
arise of new species
Term
sympatric speciation
Definition
when populations become genetically isolated even though ranges overlap
Term
temporal isolation
Definition
"time"; mating seasons differ
Term
zygote
Definition
two gametes make a zygote
Term
allometric growth
Definition
disproportionate growth (not all parts of body grow at same rate)
Term
exaptation
Definition
structures that arise and are used on one context but in another context have different or additional functions; wings on penguin
Term
homeosis
Definition
general term for any mutation that results in a displaced organ
Term
homeotic genes
Definition
determine the placement of body parts
Term
paedomorphosis
Definition
a condition in which the timing of sexual maturity is altered (compared to parental group)
Term
heterochrony
Definition
an alteration in crime, or a change in order, of one or more events
Term
carbon 14 dating
Definition
uses half life of carbon 14 to find the approximate age of objects 40,000 years or younger
Term
continental drift
Definition
movement of earth's continents
Term
dendrochronology
Definition
tree ring dating
Term
fossil
Definition
remains or impressions of former living things
Term
half life
Definition
period of time it takes for a substance undergoing decay to decrease by half
Term
amino acid
Definition
basic monomer of proteins; R group is variable
Term
carbohydrate
Definition
energy storage and structural molecules; storage in nucleic acids
Term
cellulose
Definition
structural molecule (carbs); polymer of glucose
Term
cholesterol
Definition
steroid
Term
DNA (deoxyribonucleic acid)
Definition
nucleic acid; deoxyribose; A,T,C, or G
Term
glycogen
Definition
animals store surplus sugar in this form
Term
heat of vaporization
Definition
resistant to phase changes; takes a lot of energy to create vapor or steam; water's HOV is high!
Term
lipid
Definition
energy, storage, protection, insulation
Term
macromolecule
Definition
large organic compounds; carbs, lipids, proteins, & nucleic acids
Term
nitrogenous base
Definition
ringed structures; nitrogen, carbon, hydrogen
Term
peptide bond
Definition
condensation synthesis; one water is REMOVED to join amino acids
Term
phospholipids
Definition
lipids that are amphipathic; component of cellular membranes
Term
protein (polypeptide)
Definition
amino acids form polypeptide chains
Term
RNA (ribonucleic acid)
Definition
nucleic acid- ribulose; A,G,C,U
Term
high specific heat
Definition
takes large amount of energy to raise temperature of water; water absorbs and stores heat efficiently
Term
starch
Definition
card; used for energy storage
Term
triacylglycerol
Definition
fats & oils; 3 fatty acids + 1 glycerol
Term
helicase
Definition
unwinds DNA helix; enzyme
Term
single-stranded binding protein
Definition
keeps strands seperate
Term
primase
Definition
initiates replication; enzyme
Term
DNA polymerase
Definition
adds nucleotides to unwound parent molecule
Term
ligase
Definition
seals fragments (Okazakis) into a continuous strand of DNA
Term
Okazaki fragment
Definition
short stretches of DNA
Term
primer
Definition
made of few nucleotides of RNA (starts lagging strand)
Term
RNA polymerase
Definition
separates strands and joins RNA nucleotides along exposed DNA template
Term
mRNA
Definition
one strand of DNA (complementary to only ONE of the DNA strands)
Term
ribosomal RNA
Definition
combines with proteins to form ribosomes
Term
tRNA
Definition
has corresponding aminoacyl-tRNA
Term
codon
Definition
sequence of bases (3)
Term
anticodon
Definition
sequence of 3 nucleotides thats complementary to codon in mRNA strand
Term
antiparallel
Definition
strands have opposite parallels
Term
gene regulation
Definition
genes can't be "turned on" to synthesize a needed protein, or "turned off" to stop synthesis of a protein that's no longer needed
Term
genetic code
Definition
ordering of nucleotides in DNA molecules that carries genetic information on living cells
Term
replication fork
Definition
where DNA is unwinding
Term
template strand
Definition
stand that's copied in transcription
Term
Archaea
Definition
type of prokaryotes
Term
asexual reproduction
Definition
no gametes; parent splits
Term
bacteria
Definition
single-celled prokaryotes
Term
bacillus
Definition
rod-shaped bacteria
Term
chemoautotroph
Definition
inorganic substance + carbon
Term
chemoheterotroph
Definition
energy (organic) + carbon
Term
coccus
Definition
sphere-shaped bacteria
Term
eukaryote
Definition
have nuclei, multicellular, larger
Term
pathogenic
Definition
harmful :(
Term
phage
Definition
viruses that infect bacteria
Term
photoautotroph
Definition
sunlight + carbon
Term
photoheterotroph
Definition
sunlight + organic carbon
Term
pilus
Definition
appendage used in conjugation; in order to produce pili, must have "factor F"
Term
prokaryote
Definition
lack nuclei, single-celled, small
Term
spirillium
Definition
spiral-shaped bacteria
Term
antibiotic
Definition
antibacterial medications
Term
capsule
Definition
sticky substances; additional layer outside of cell wall
Term
cell wall
Definition
rigid layer of polysaccharides enclosing membrane of cells; protective barrier
Term
endospore
Definition
thickly coated, resistant cells; formed in harsh conditions
Term
endotoxin
Definition
protein components of the outer cell membrane in some gram neg bacteria
Term
exotoxin
Definition
proteins secreted by prokaryotes
Term
flagellum
Definition
tail; helps move!
Term
lipopolysaccharide
Definition
make up membrane of gram neg bacteria; toxic (counteract natural defenses of host)
Term
opportunistic infection
Definition
caused by pathogen; when host's immune system is impaired
Term
pathogen
Definition
harmful :(
Term
peptidoglycan
Definition
polymer; sugar + polypeptides
Term
plasma membrane
Definition
thin membrane enclosing cytoplasm of cell
Term
sporulation
Definition
formation of endosperes
Term
symbiosis
Definition
2 species having an extended and intimate association
Term
anaerobic
Definition
does NOT require oxygen to survive
Term
bioremediation
Definition
organisms remove contaminants from environments
Term
carbon fixers
Definition
use simplest form of carbon
Term
facultative anaerobes
Definition
can use oxygen if it's present; but not necessary for survival
Term
legume
Definition
peas, alfalfa, soy beans
Term
nitrogen cycle
Definition
cyclic movement of nitrogen in different chemical forms form the environment to organisms & back to the environment
Term
nodule
Definition
"bump" that rhizobia live in (root of plant)
Term
obligate aerobe
Definition
requires oxygen
Term
obligate anaerobe
Definition
doesn't require oxygen
Term
rhizobia
Definition
species of bacteria that make mutualism bond with legumes
Term
saprobe
Definition
organisms that live on dead and decaying matter
Term
adenosine triphosphate (ATP)
Definition
major source of chemical energy
Term
chemical work
Definition
non-spontaneous reactions
Term
endergonic reaction
Definition
energy enters the system to do work (+G)
Term
endothermic reaction
Definition
heat is absorbed (+H)
Term
energy
Definition
that which or can move matter
Term
enthalpy
Definition
total energy in system (H)
Term
entropy
Definition
disorder/randomness (S)
Term
energy coupling
Definition
use of an exergonic process to drive an endergonic process
Term
exergonic reaction
Definition
energy exits the system (-G)
Term
exothermic reaction
Definition
heat is released (-H)
Term
free energy
Definition
energy available to do work (G)
Term
kinetic energy
Definition
moving matter
Term
mechanical work
Definition
contracting muscle cells
Term
non-spontaneous reaction
Definition
energetically unfavorable reaction
Term
potential energy
Definition
stored energy
Term
spontaneous reaction
Definition
releases energy (-G)
Term
cellular respiration
Definition
catabolic pathway; series of steps that convert chemical energy in glucose to ATP; anabolism of ATP
Term
electronegativity
Definition
molecules that <3 electrons; more likely to oxidize other molecules; steals electrons
Term
fermentation
Definition
glucose is partially broken down and NAD+ is generated
Term
glycolysis
Definition
initial breakdown of glucose to pyruvate, water, & NADH
Term
NAD+
Definition
oxidized (free to pick up electrons)
Term
NADH
Definition
reduced form
Term
oxidation
Definition
molecule loses electron
Term
oxidized
Definition
loses energy
Term
pyruvate
Definition
product of glycolysis (pyruvic acid)
Term
redox
Definition
transfer of electrons (reduction + oxidation)
Term
reduced
Definition
gains energy
Term
reduction
Definition
electron is gained ("reducing" positive charge)
Term
substrate-level phosphorylation
Definition
phosphorylated molecule transfers a phosphate group to ADP
Term
ATP synthase
Definition
aids in ATP production (chemiosmosis)
Term
charge differential (voltage)
Definition
force caused by a difference in electric charge between 2 areas
Term
chemiosmosis
Definition
ADP to ATP (phosphorylation); movement of hydrogen ions across membrane
Term
electron transport chain
Definition
transfer of H+ ions across membrane
Term
FAD & FADH2
Definition
electron carriers; FAD is oxidized, FADH2 is reduced
Term
homeotherm
Definition
warm-blooded mammal that keeps body temperature relatively constant
Term
Krebs Cycle
Definition
electrons are removed from acetyl CoA and these electrons reduce NAD+ and FAD
Term
mitochondrial matrix
Definition
Krebs cycle happens here; in mitochondrion
Term
mitochondrion
Definition
membrane-enclosed powerhouse of cell
Term
oxidative phosphorylation
Definition
uses energy released from oxidation of nutrients to produce ATP
Term
proton
Definition
positively charged ion
Term
terminal electron acceptor
Definition
oxygen
Term
feedback inhibition (negative feedback)
Definition
reaction's end products halt the reaction when enough product is made
Term
catalyst
Definition
initiate enzymes to facilitate reactions
Term
enzyme substrate complex
Definition
enzyme + substrate; specific!
Term
activation energy
Definition
input of energy to start a reaction
Term
active site
Definition
substrates fit into this (key & lock)
Term
allosteric enzyme
Definition
causes conformational changes when allosteric sites are filled
Term
substrate
Definition
certain type of molecule that enzymes act on
Term
endosymbiosis
Definition
one organism begins living inside another
Term
inhibitor
Definition
change enzyme's conformation so substrate can't bind to it
Term
cyanobacteria
Definition
use photosynthesis
Term
antioxidant
Definition
prevents oxidation or inhibits reactions promoted by oxygen
Term
anaphase
Definition
chromosomes separate
Term
cell cycle
Definition
continuous; 4 phases: M phase, G1, S, G2
Term
cytokinesis
Definition
organelles and other cytoplasmic components that were replaced during G1, S, G2 are partitioned
Term
interphase
Definition
cells are "chillin" before mitosis starts
Term
karyokinesis
Definition
separation of chromosomes
Term
M phase
Definition
mitosis + cytokinesis; part of cell cycle
Term
metaphase
Definition
chromosomes align at middle of cell on the metaphase plate
Term
prometaphase
Definition
chromosomes attach
Term
prophase
Definition
condensation of chromosomes (wind up!)
Term
S phase
Definition
2nd stage of interphase between G1 & G2; period of replication
Term
telophase
Definition
chromosomes relax
Term
cytoskeleton
Definition
network of actin filaments and microtubules in cytoplasm
Term
endomembrane system
Definition
series of membranes suspended in cytoplasm (compartments)
Term
rough endoplasmic reticulum
Definition
houses ribosomes (where proteins get synthesized)
Term
smooth endoplasmic reticulum
Definition
synthesizes lipids & degrades toxins
Term
glycosylation
Definition
process in Golgi apparatus
Term
Golgi apparatus
Definition
involved in processing proteins (membrane-bound)
Term
intermediate filaments
Definition
"cables"; support cell structure and anchoring organelles
Term
lysosome
Definition
break down material in cytoplasm; eats shit!
Term
microfilament
Definition
actin "beads" involved in cell motility
Term
microtubules
Definition
hollow tubes; paired tubulin molecules; mitosis/structure
Term
nuclear pores
Definition
holes in nuclear envelope that process mRNA migrates to ribosomes
Term
nucleus
Definition
provides genetic info
Term
signal sequence
Definition
amino acid sequence
Term
signal recognition particle (SRP)
Definition
recognizes and targets specific proteins to endoplasmic reticulum in eukaryotes
Term
alveoli
Definition
small cavities enclosed in membranes that hug the internal cell surface
Term
alveolata
Definition
monophyletic; alveoli; dinoflagellates, apicomplexans, ciliates
Term
apical complex
Definition
cluster of microtubules & organelles located in apex of cells in infectious stage
Term
apicomplexans
Definition
parasites (live & reproduce within tissues of animals)
Term
dinoflagellate
Definition
dinstinct shapes; "frames"; flagella
Term
diplomonad
Definition
modified mitochondria
Term
euglenoid
Definition
Euglena & its relatives; photosynthetic, flagella, paramylum (surplus carbs)
Term
euglenozoa
Definition
monophyletic; heterotrophs & autotrophs
Term
kinetoplast
Definition
stores extranuclear DNA
Term
kinetoplastid
Definition
euglenozoans (trypanosoma); have large mitochondrion and kinetoplast
Term
parabasalids
Definition
anaerobes; lack functional mitochondria; Trychomonas (STD) & Trychonympha (termite guts)
Term
paramylum
Definition
euglenoids store surplus carbs from photosynthesis as this
Term
protist
Definition
eukaryotic; unicellular
Term
slime molds
Definition
related to amoeboid protists; unicellular; large bags of cytoplasm
Term
algae
Definition
undergo more photosynthesis more than plants; produce 90% of oxygen
Term
carotenoid
Definition
pigments (in chloroplasts)
Term
chlorophyll
Definition
green pigment in plants
Term
chloroplast
Definition
stacks of grana (flattened thylakoids)
Term
electromagnetic radiation
Definition
how sunlight energy is released from thermonuclear reactions in the sun
Term
granum
Definition
thylakoids (flattened membranes); stacks
Term
NADPH+ & NADPH
Definition
NADPH+ is final electron acceptor at ETC, reduced to NADPH
Term
photochemistry
Definition
sun's energy transforms into chemical energy
Term
photon
Definition
"packets" of light that travel
Term
photophosphorylation
Definition
production of ATP using energy of sunlight
Term
photosystem II
Definition
1st ETC; light absorbed by pigments, channeled to chlorophyll, excites electrons
Term
photosystem I
Definition
2nd ETC; 2nd type of chlorophyll molecule
Term
pigment
Definition
compounds that absorb light
Term
thylakoid
Definition
light reactions occur here (in chloroplasts)
Term
wavelength
Definition
distance over which the wave's shape repeats
Term
Calvin Cycle
Definition
glucose is made; uses ATP & NADPH from light reactions
Term
carbon cycle
Definition
carbon dioxide fixed into sugars; oxidized back into carbon dioxide
Term
chromatography
Definition
analyzing dead algae for amount of carbon
Term
energetic
Definition
total energy in relations and transformations in a system
Term
G3P
Definition
3C molecule; regenerates to RuBP
Term
rubisco
Definition
enzyme adds carbon dioxide to 5C RuBP to make 6 carbon molecule
Term
stoma
Definition
pores in leaves
Term
alternation of generations
Definition
alternation between MULTICELLULAR haploid & diploid stages
Term
chlorophyte
Definition
green algae; resemble plants
Term
chrysophyte
Definition
golden algae; accessory pigments are carotenoids and xanthophylls
Term
diatom
Definition
encased in (glass) silica shell & lined with perforations for gas-exchange
Term
heteromorphic
Definition
haploid & diploid stages exhibit different forms
Term
hyphae
Definition
threadlike filaments forming fungal mycelium
Term
isomorphic
Definition
haploid and diploid stages exhibit structurally similar forms
Term
oomycete
Definition
cellulose; diploid; non-photosynthetic; resemble algae
Term
phaeophyte
Definition
brown algae; large!; kelp forests
Term
phycobilin
Definition
red pigments; can be dark
Term
pseudopodium
Definition
projections used by golden algae to prey on smaller organisms
Term
rohodophyte
Definition
marine algae; red accessory pigments
Term
seaweed
Definition
thallus; holdfast; blades
Term
silica
Definition
glass-like shell on diatoms
Term
stramenopilan
Definition
diatoms, seaweeds, water molds
Term
antheridium
Definition
male gametangium
Term
archegonium
Definition
female gametangium
Term
charophyte
Definition
group of green algae
Term
cuticle
Definition
waxy; found on surface of all above-ground parts of the plant
Term
embryophyte
Definition
embryo is within gametangium
Term
gametangium
Definition
site of gamete production (can be male or female)
Term
rhizoid
Definition
root-like structures to anchor nonvascular plants to the surface they grow on
Term
vascular tissue
Definition
allow transport of water and nutrients throughout the plant
Term
wax
Definition
lipid; keeps moisture in plants; hydrophobic, impermeable to water
Term
fern
Definition
seedless vascular plant
Term
heterosporous
Definition
2 types of HAPLOID spores (M & F)
Term
homosporous
Definition
single type of spore (bisexual)
Term
horsetail
Definition
sphenophyta (seedless vascular)
Term
lignin
Definition
stable molecule; gives support to plants & wood
Term
lycophyte
Definition
seedless vascular
Term
megaspore
Definition
develops into haploid female gametophytes, then produce eggs
Term
microspore
Definition
develop into male gametophytes, produce sperm
Term
phloem
Definition
transports sugars made during photosynthesis down to roots for energy
Term
xylem
Definition
vasculature where water & minerals travel from roots up to stems to other parts of the plant; nonliving
Term
cycad
Definition
nonflowering seed plant; slow-growing and long-lived perrenials
Term
deciduous
Definition
trees that drop their leaves each fall
Term
double fertilization
Definition
2 sperm cells enter ovule; one gets egg (2n) and one gets other cell (3n)
Term
gingko
Definition
"silver apricot"; dioecious; motile sperm; look along sidewalk
Term
gnetophyte
Definition
nonflowering seed plant; related to angiosperms; ONLY plant to undergo double fertilization
Term
gymnosperm
Definition
"naked seed"; nonflowering seed plants
Term
monoecious
Definition
M & F reproductive parts reside on same plant
Term
sporophytic tissue
Definition
nourishes gametophyte; seeds develop in here
Term
angiosperm
Definition
flowering seed plants
Term
dicot
Definition
2 embryonic leaves (peanuts, beans, pumpkins)
Term
imperfect flower
Definition
has BOTH stamens & carpels
Term
monocot
Definition
one seed leaf
Term
perfect flower
Definition
has BOTH stamens & carpels
Term
pollination
Definition
male pollen reaches female stigma
Term
primary growth
Definition
grows TALLER
Term
root
Definition
anchors plants; take up water & nutrients
Term
secondary growth
Definition
grows WIDER
Term
shoot
Definition
aerial part of plant (stem, etc.)
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