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Bio Test Two
Random memorizing
186
Biology
Undergraduate 2
02/15/2012

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Term
What are protists?
Definition
all euks except plants, animals and fungi
Term
polytomy
Definition
three species at the same time diverge from a single ancestory species
Term
What group are protists?
Definition
paraphyletic
Term
What are the unifying traits of protists? (5)
Definition
Membrane bound organelles, sexual/asexual reproduction, unicellular, nutritionally diverse
Term
feeding strategy of protists
Definition
photoautotroph, heterotroph, mixotroph
Term
what lineage gives rise to red and green algae?
Definition
eukaryotic heterotroph engulfs photosynthetic cyanobacterium
Term
Secondary endosymbiosis
Definition
multiple independent endosymbiotic events
Term
Five eukaryotic subgroups of protists
Definition
excavata, chromaveolata, rhizaria, archaeplastida, unikonta
Term
excavata
Definition
they have highly modified mitochondria, multiple flagella, and an 'excavated' feeding groove
Term
Chromalveolata
Definition
Derived from secondary endosymbiosis of red algae. Dinoflagelates. Cause red tide, bioluminescent, and cause human diseases
Term
Dinoflagelates
Definition
are the main component of plankton
Term
Rhizaria
Definition
amoeba-like, thread like pseudopodia. They are parasites of plants and animals
Term
what make excellent index fossils?
Definition
rhizaria
Term
what is pseudopodia?
Definition
a cellular extension of amoeboid cells used in moving and feeding
Term
Archaeplastida
Definition
main groups include red algae, green algae, and land plants- they help with reef formation and is edible
Term
Unikonta
Definition
Amoebazoans; tube-like pseudopodia; choanoflagellates
ex: cellular slime mold
Term
choanoflagellates
Definition
flagellated collar cell, closest protist relative to animals
Cause human diseases
Term
fungi and ____ are closely related, but still diverged
Definition
animals
Term
what are fungi? [type of eating]
Definition
absorptive heterotrophs
Term
What are fungi? 5 things
Definition
euks, cells walls of chitin, closely related to animals, absorptive heterotrophs, can act in many different lifestyles
Term
what are the lifestyles of fungus?
Definition
decomposers, parasitic, mutualistic
Term
Multicellular Fungi: hyphae, and two types of hyphae
Definition
it is the filamentous cell-the basic unit of body.
Septate and coenocytic
Term
Septate
Definition
in hyphae-when there is a porous septum that separates the fungal cells
Term
coenocytic
Definition
lack septa
Term
the hyphae is made up of what?
Definition
mycelium
Term
Multicellular Fungi: haustoria
Definition
specialized hyphae that form symbiosis with host and exchanges or extracts nutrients
Term
Multicellular Fungi: Mycorrhizae
Definition
mutualistic haustoria associated with plant roots; improves water/nutrient uptake
Term
Multicellular Fungi: fungus trap
Definition
parasitic haustoria associated with nematodes
Term
[image]
Definition
Fungal Life Cycle
Term
The haploid mycelium produces
Definition
spores
Term
Spores are contained in the
Definition
sporangium
Term
Who can decompose lignin
Definition
large component of cell walls
Term
What do haploid mycelium produce to get partners?
Definition
phermones
Term
mycelia change the movement patterns in response to chemicals through
Definition
chemotaxis
Term
unique fungal structures form between
Definition
plasmogamy and karyogamy
Term
plasmogamy
Definition
fusion of cytoplasm
Term
karyogamy
Definition
fusion of haploid nuclei
Term
what are the 6 fungal phyla?
Definition
Microsporidia, chytridomycota, zygomycota, glomeromycota, ascomycota, basidiomycota
Term
microsporidia
Definition
intracellular parasite that uses a polar tube
Term
chytridomycota
Definition
aquatic fungi with flaggellated spores and gametes
spores contained in sporangium-reproductive structure
Term
zygomycota
Definition
sexual phase produces zygosporangium--persists for months in harsh environments, can stay dormant for months
Term
Glomeromycota
Definition
produces mutualistic mychorrhizae
Term
Ascomycota
Definition
sexual phase produces ascocarp
Term
ascocarp
Definition
cup with microfilaments
Term
basidiomycots
Definition
club fungi
sexual phase produces basidiocarp
Term
endophytes
Definition
'within plants' provide protection- helps fight off parasitic invasion
Term
what percent of plant parasites are fungi?
Definition
80
Term
what phylum is fungus in?
Definition
bastiddio myceleis*?
Term
Shared characteristics of plants - 4
Definition
multicellular, eukaryotic, photosynthetic, cell walls of cellulose
Term
charophyceans are
Definition
algae most closely related to plants
Term
charophyceans are found where
Definition
shallow waters, temporarily
Term
what are the shared characteristics between plants and charophyceans? 4
Definition
rose shaped complexes for celluluse synthesis, similar peroxisome enzyme, similar flagellated sperm structure, and phragmoplast
Term
what are phragmoplasts and where do you find them?
Definition
specialized microtubules that form during cell division. they are seen in charophyceans
Term
when was land invaded?
Definition
ordovician
Term
cuticle
Definition
allowed for plants to select for a better organism
Term
sporopollenin
Definition
durable polymer that prevents spores/pollen from drying out: it protects the gametes
Term
what makes plants unique? 5 things
Definition
Apical meristems, alteration of generations, walled spores in sporangia, multicellular gametangia, multicellular dependent embryos
Term
Apical meristems
Definition
undifferentiated cells allowing growth - essentially a stem cell. above ground shoots obtain light and CO2 while below ground roots get H2O and minerals vertical growth
Term
Alteration of Generations
Definition
multi-cellular 2n individual alternated with multicellular n individual-switch between hap/dip
Term
Alteration of generations: gametophyte
Definition
haploid
Term
alteration of generations: sporophyte
Definition
multicellular diploid
Term
Walled spores in sporangia
Definition
walls of sporangia protect spores- they need these adaptations to protect them form the harsh environment
Term
Multicellular gametangia
Definition
gamete producing organ- can grow out of sporophyte/gametophyte
Term
Multicellular dependent embryos
Definition
embryo is dependent on the mother
Term
example of a non vascular plant
Definition
bryophytes
Term
what is the dominant life cycle for NON vascular & what do they need to reproduce?
Definition
gametophyte; water
Term
What do a gametophyte possess?
Definition
antheridia and archegonia
Term
antheridia
Definition
male gametangia
Term
archegonia
Definition
female gametangia
Term
what does the sporophyte grow from?
Definition
archegonium
Term
the ___ sporophyte is growing out the the ____ female gametophyte...specifically the ____
Definition
diploid, haploid, archegonium
Term
what do the bryophites lack
Definition
a vascular system, duh!
Term
bryophyte taxa include
Definition
liverworts, hornworts, and mosses
Term
Vascular tissue
Definition
cells that form tubes to transport water and nutrients
Term
xylem
Definition
water/mineral transport in vascular tissue
Term
phloem
Definition
sugar/organics transport in vascular tissue
Term
what is the dominant life cycle in vascular?
Definition
sporophyte
Term
what do roots do
Definition
anchor plants, absorb nutrients, provide support
Term
what are the two types of leaves?
Definition
microphyll and megaphyll
Term
microphyll
Definition
spine shaped lea with single strand of vascular tissue
Term
megaphyll
Definition
broad leaf with vascular network
Term
sporophylls
Definition
modified leaves that bear sporangia - where spores are formed
Term
what are the two types of sporophylls
Definition
homosporus and heterosporus
Term
homosporous
Definition
single spore that gives rise to both male and female plants
Term
heterosporus
Definition
megaspore becomes female, microspore becomes male
Term
Vascular seedless plants examples
Definition
lycophytes, horsetails, whiptails
Term
significance of vascular plants
Definition
allows the plants biomass to enlarge--transformed land/atmosphere, facilitated industrial revolution
Term
Shared traits between plants/charophyceans and algae
Definition
multicellular, euks, photosynthetic, and cell walls of cellulose
Term
shared traits between plants and charophyceans
Definition
Derived traits: rose shaped complexes for cellulose synthesis, peroxisome enzymes, formation of phragomoplast
Term
Shared traits of all SEED plants
Definition
reduced gametophyte stage, heterospory, ovules, pollen
Term
Reduced gametophyte stage - sporophyte/gametophyte in SEED plants
Definition
sporophyte starts to become more dominant with evolution of vascular tissue- gametophyte is smaller and less significant
Term
seed
Definition
sporophyte embryo packed within food and encased
Term
where will gametophyte never exist when we're talking about seed plants?
Definition
outside the sporophyte--not seen, remember?
Term
heterospory
Definition
produce megaspore and microspore that develop into male/female gametophyte
Term
ovule
Definition
female structure containing megasporangium, megasore and integument
Term
megaspore divides via
Definition
1 nucleus -> egg, 1 -> food supply, 2 -> bar bodies
Term
megasporangium
Definition
will eventually form the food that the embryo will feed off of
Term
pollen
Definition
male structure containing microspore, transferred via wind or animals-- water independent
Term
seedless plants do not depend on
Definition
water
Term
Evolution of seed plants occured when and in what period?
Definition
350 MYA Carboniferous period
Term
Two groups of flowering plants
Definition
gymnosperms and angiosperms
Term
Gymnosperms
Definition
seeds are not contained within a vessel like they are in angiosperm
Term
phyla of gymnosperms
Definition
Cycadophyta and Coniferophyta
Term
Cycadophyte
Definition
phylum for gymnosperms: known as cycads: compound leaves with short trunks- dominant tree during Mesozoic
Term
Coniferophyta
Definition
phylum for gymnosperms: pine/fir trees- most species rich of gymnosperms
Term
Angiosperm
Definition
ovule surrounded by ovary or fruit; flowering plants
Term
Flower structure (in angiosperm)
Definition
Stamen, Carpel, Petal and sepal
Term
Stamen
Definition
male pollen producing structure
Term
carpel
Definition
Female ovule producing structure-long, slender piece that connects the stigma to the ovary
Term
petal and sepal
Definition
petals attract pollinators
Term
Fertilization in an angiosperm
Definition
pollen lands on stigma; creates pollen tube along style. Pollwn contains 2 sperm nuclei
- one sperm fertilizes egg and one fertilizes polar nuclei
Term
What does the fertilization in an angiosperm give rise to
Definition
one zygote and the endosperm which feeds the zygote
Term
Once ovule is fertilized in angiosperm
Definition
ovary matures into a fruit
Term
different oragansims are classified by
Definition
how they absorb their nutrients
Term
how do fungi attain nutrients?
Definition
digesting outside & absorption
Term
What are the derived traits of animals? 4
Definition
multicellular ingesting heterotrophs, unique tissues, lack cell walls, intercellular junctions
Term
animals lack cell walls; fungus/plants have
Definition
chitin/cellulose
Term
3 intercellular junctions
Definition
tight, desmosomes and gap
Term
Tight junction
Definition
protein binds to neighboring membranes; water tight--keeps fluids from flowing even though its not super strong
Term
desmosomes
Definition
strong rivet-like proteins that connect
Term
gap junctions
Definition
provides a pore through which cellular products can be exchanged; important in heart beating
Term
who are the closest protist relative of animals?
Definition
choanoflaggelates
Term
First good animal fossils came
Definition
Edicaran biota 575 MYA: late proterozoic era
Term
basic body plans developed- what and when?
Definition
late protezoic era: radial symmetric, bilateral symmetry, and segmentation
Term
what situation were we in that helped the cambrian explosion really take effect?
Definition
the organisms had undergone modification so they were ready to get expanded
Term
Cambrian period; 550 MYA (4)
Definition
rapid increase in animal orgers, major phyla established, diversification likely caused by increase in O2, diversifying selection
Term
what percent are mammals
Definition
<.01%
Term
haploid or diploid is dominant for fungus?
Definition
haploid
Term
humans reproduction # is mostly
Definition
diploid
Term
Zygote development
Definition
1) zygote undergoes cleavage 2) bastula undergoes gastrulation 3) gastrula has defined endosperm
Term
Hox genes
Definition
regulatory genes that dictate the developing body plan
Term
what is the correlation between body axis and chromosomal position?
Definition
Linear; this is odd because usually cells get super broken up--why don't hox genes
Term
___ mutations lead to ___ changes
Definition
small, big
Term
gene duplications allow for
Definition
greater anatomical complexity
Term
radial symmetry
Definition
in animal body plants; no matter how you cut something up, it is still symmetrical
Term
Bilateral symmetry
Definition
animal body parts: cut one way symmetrically, not any more
Term
Tissues
Definition
Diploblastic- 2 dermal layers
triploblastic - 3 layers
Term
Body Cavities
Definition
Coelem
Term
what coelems are we concerned about?
Definition
the ones in triploblastic thingss
Term
what does the coelem do?
Definition
hold everything
Term
pseudocoelomate
Definition
body cavity is present, but not completely lined with mesoderm
Term
acoelomate
Definition
no body cavity
Term
coelomate
Definition
body cavity is completely lined with mesoderm
Term
What are invertebrates; 2 definitions
Definition
animals that dont have a backbone
animals that are not cordates
Term
what is a cordate
Definition
has a spinal cord
Term
what phylas are invertebrates?
Definition
34/35
Term
what percent of animal species are invertebrates?
Definition
95%
Term
what percent of animals are insects?
Definition
75% - one class within one phylum make up this 75%
Term
what percent are beetles?
Definition
35%
Term
all animals are included by what name
Definition
metazoan
Term
Primitive animals were (6 things)
Definition
asymmetric, diploblastic with no true tissue, no muscle, nervous system, digestive system, etc
Term
Phylum porifera are symmetric/asymmetric
triploblastic/diploblastic
Definition
asymetric, diploblastic
Term
Phylum porifera - do they have organs?
Definition
no
Term
What are their unique structures and shells? 3 thigns
Definition
Spicules - made of calcium carbonate: provide structural support (collagen is not supportive enough)
Choanocytes - collar cells; functioning unit
Diploblastic - ectoderm.endoderm.mesoderm
Term
Eumetazoans
Definition
animals with true tissues: possess nervous 'net', digestive system, contractile tissues, and radial symmetry
Term
Phylum Cnidarian are what animals
Definition
corals, jellyfish, hydras
Term
Phylum Cnidarian
a/symmetric? diploblastic/triploblastic
Definition
Symmetric, diploblastic
Term
Phylum Cnidarian: what are the two distinct body parts?
Definition
Medusa- mobile jellyfish
polyp - stationary corals
Term
what is the rudimentary digestive tract called?
Definition
gastrovascular cavity
Term
Gastrovascular cavity takes what in and pushes what out
Definition
food in and pushes waste out
Term
what contain nematocysts
Definition
cnidocytes
Term
Evolution of bilateral symmetry and triploblastic tissue:
Three major bilateral animal groups:
Definition
deuterostomes, lophotrochozoa, ecdysozoa
Term
evolution of triploblastic tissues allows evolution of
Definition
coelom
Term
Lophotrochozoa
Definition
platyhelminthes, rotifera, mollusca, and annelida
Term
Phylum platyhelminthes: animals
Definition
flatworms e.g. tapeworms, flukes, planeria
Term
Phylum platyhelminthes: what is incomplete?
Definition
their gut
Term
Phylum platyhelminthes: do they have a circular system?
Definition
no!
Term
Phylum platyhelminthes: what are the three types
Definition
bilateral, triploblastic, acoelomates
Term
So, if something is triploblastic, we have to consider whether or not it is:
Definition
acelomate, pseudocelomate or true coelom
Term
cephalization
Definition
evolutionary trend that concentrates nervous tissue to one end--allows animal to sense the environment and react to it
Term
Phylum platyhelminthes: three structures unique to them
Definition
ganglia - the beginning of the brain
eyespots - to see light
Term
Phylum Rotifera: what are they
Definition
wheel bearers
Term
Phylum Rotifera: what are four traits about them
Definition
complete gut, no circulatory system, corona, parthenogenetic
Term
corona
Definition
ciliated discs for feeding - related to Phylum Rotifera:
Term
Phylum Mullusca: what are they
Definition
snails, clams, octapus.
Term
Phylum Mullusca: the main parts
Definition
foot-->visceral mass-->mantle
Term
Phylum Mullusca: radula
Definition
feeding apparatus - organisms scrape material
Term
Phylum Mullusca: range of cephalization and nervous system
Definition
it ranges from not advanced at all to really advanced
Term
Phylum Mullusca: the four classes
Definition
polyplacophora, gastropoda, bivalvia, cephalopoda
Term
Phylum Mullusca: Polyplacophora
Definition
aka chitons:"many plates" typically have 8 plates; live on intertidal rocks--attach to rock, scrape nutrients
Term
Phylum Mullusca: Gastropoda
Definition
Snails: most have spiral shells
tirsion - 180 degree twisting of visceral mass, brings anus by head
Term
Phylum Mullusca: Bivalvia
Definition
clams, oysters, mussels, scallops
They have hinged shells with adductor muscles (allow to open and close) shell forms on the mantle
Term
Phylum Mullusca: Cephalopoda
Definition
squid, octupi
means 'head-foot', no shell, active hunters, and they are super good learners
Term
Phylum Annelida are what animals
Definition
Segmented worms
Term
Phylum Annelida have what- 4 things
Definition
complete gut, closed circulatory, some cephalization, some posses parapodia
Term
parapodia
Definition
lateral feet
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