Term
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Definition
1. Multicellular heterotrophs which ingest their food
2. lack rigid cell walls
3. most reproduce sexually, gametes form by meiosis |
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Term
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Definition
-multicellular
-not organized into tissues or organs |
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Term
Characteristics of sponges (4) |
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Definition
-cells embedded in matrix
-chaonocytes & pores allow sponge to filter feed
-anchor to seafloor, beat flagella to draw water in
-some contain spongin |
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Term
Cnidaria (Jellyfish, sea anemones, hydra) |
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Definition
radial & bilateral symmetry
specialized tissue |
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Term
Characteristics of Jellyfish |
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Definition
-bell (take water into bell, shoot out, allows swimming)
-ocelli ("eyes")
-touch receptors
-simple nervous system (helps determine position, detect presence of animals)
-mouth
-oral lobes
-tentacles
-eat fish, shrimp, eaten by larger fish, crabs, sea turtles |
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Term
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Definition
-stinging cells on tentacles & oral lobes
-contain nematocysts - "harpoons" that spear prey, draw harpoon back to cnidocyte |
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Term
reproduction of jellyfish |
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Definition
asexual & sexual phases, medusa & polyp
egg->planula->polyp->older disked polyp
-> disk (young medusa) -> medusa |
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Term
Platyhelminthes (flatworms & tapeworms) |
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Definition
-internal organs & symmetry
-anterior brain, connected to (at least) one pair of nerve cords
-eyes
-protonephridia
-hermaphroditic
-mouth, larynx, simple gastrovascular cavity
-O2 & CO2 diffuse across body
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Term
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Definition
-pseudocoelem
-perfectly cylindrical body
-move using undulations of body (press against particles
- |
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Term
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Definition
-pseudocoelem
-corona - ciliated surface, cilia beat in waves, gives impression of rotation
-freshwater environ. |
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Term
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Definition
-coelem (completely enclosed in mesoderm)
-specialized tissues
-head
-central sections w/ body's organs, enclosed in mantle (tissue), includes gills
-foot
-tongue-like organ to capture food |
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Term
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Definition
-Gastropods (snails & slugs) - hard protective shell, use foot to crawl
-Bivalves (clams, oysters, scallops) - 2-part shell w/ hinge
-Cephalopods (octopuses & squids) - no shell, use mantle for jet propulsion |
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Term
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Definition
-most are coiled
-use foot to move, emit mucus from foot to glide (move more easily)
-head - 2 pairs of tentacles (upper = light vs dark, lower = vibrations)
-pneumostome (respiratory)
-mouth |
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Term
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Definition
-when ready to mate, move w/ foot raised
-push feet together, insert dart, causes genital pore to come out
-hermaphroditic, insert sperm into each other, eggs fertilized internally, laid 1-2 months later |
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Term
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Definition
-suckers on arms (allows "tasting" of food)
-heart
-kidneys
-gills (work w/ funnel tubes which pull water over gills)
-well developed head, brain, eyes (keen eyesight) |
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Term
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Definition
-segmentation
-circular & longitudinal muscles
-burrow for food in soil
-earthworms have crop & gizzards
-closed circulatory system
-ventral nerve cord
-breathes through surface of body = moist envrionments!
-taste, touch, sense light through skin |
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Term
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Definition
-used in mating in annelids
-secretes mucus layer which brings eggs & sperm together - called egg case |
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Term
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Definition
cell walls contain lignin = wood
-show secondary growth |
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Term
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Definition
no lignin
no secondary growth
stems & leaves die @ end of growing season |
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Term
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Definition
herbaceous
go from seed to seed in less than 1 yr
ex. corn, marigolds, geraniums |
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Term
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Definition
herbaceous
2 yr life cycle
yr 1 - roots, basal rosette
yr 2 - stem & flower produced
after seeds produced, plants die
ex. carrots, lettuce |
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Term
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Definition
may be herbaceous or woody
flower repeatedly over many yrs
above ground leaves/stems of herb. plants die every yr
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Term
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Definition
contain root system & shoot system (stems, leaves, flower & fruits) |
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Term
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Definition
1. anchor/give support
2. absorb nutrients
3. produce growth hormones |
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Term
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Definition
1. support leaves, allow as much light exposure as possible
2. support vascular bundles
3. store water/food |
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Term
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Definition
photosynthesis, storage & support
contains parenchyma, collenchyma & sclerenchyma cells |
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Term
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Definition
comprised of cellulose
thin cell walls
water/food storage, photosynthesis |
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Term
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Definition
primary cell wall
secondary cell wall made of pectin
support tissue |
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Term
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Definition
primary cell walls
secondary cell walls - made of cellulose & lignin |
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Term
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Definition
xylem - transports water, made of tracheids (long hollow "pipes") & vessels
phloem - transports carbs, made of seive tube members |
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Term
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Definition
protects plant
restricts water loss
cuticle - waxy layer to prevent water loss
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Term
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Definition
- opening in cuticle that permit passage of gas & water
-surrounded/regulated by guard cells
-usually open during day, but can be closed based on conditions
-when open, CO2 diffuses IN, H2O diffuses OUT |
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Term
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Definition
responsible for growth of vascular plants
clusters of actively dividing, undifferentiated cells, which produce new cells |
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Term
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Definition
produce primary growth - tips & roots of stems
ex. buds, leaf elongation, etc. |
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Term
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Definition
produce secondary growth
increases diameter of roots 7 stems |
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Term
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Definition
apical meristem -> primary meristems
1. protoderm - epidermis
2. ground meristem - parenchyma cells of cortex (chloroplasts!) & pith
3. procambium - differentiate into xylem & phloem, undiff. = vascular cambium
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Term
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Definition
results from activity of vascular cambium ->divides into xylem & phloem - single layer of each for each year = rings on trees! |
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Term
movement of water in plants |
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Definition
water is required for:
1. enzymatic reactions
2. photosynthetic cells must be moist to allow CO2 entry
3. maintains rigidity |
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Term
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Definition
ability of water to move
described by Ψ (Psi)
measured in MPA = Pa x 106
influenced by pulling forces of soil, solute, etc.
flows from HIGH (less negative) to LOW(more negative) |
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Term
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Definition
driving force behind movement of water
-loss of water from internal atmosphere via stomata
-when open stomata, water pulled up stem, big difference btwn amt of water in leaf vs outside of leaf = strong diffusion of water OUT of leaf |
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Term
pull of water depends on: |
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Definition
1. sufficient sunlight for transpiration
2. moisture availability in soil
3. cohesion
4. adhesion |
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Term
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Definition
tendency of water to stick to soil surfaces
dependent on soil texture |
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Term
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Definition
the process of turning solar energy into the chemical energy of sugar and other plant molecules
-occurs in chloroplasts in mesophyll
chlorophyll a is directly involved in conversion of solar->chemical energy |
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Term
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Definition
1. light-dependent:absorbs sunlight energy, convert to NADPH & ATP, water is split, release O2 (includes photosystem I & II, ETC) - carried out in mesophyll
2. light-independent: CO2 converted to sugar - uses ATP & NADPH (Calvin cycle) - occurs in stroma |
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Term
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Definition
CO2 entering leaf first converted to 4-C sugar before enters Calvin cycle
occurs in bundle-sheath cells
advantageous in hot regions w/ intense sunlight |
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Term
Crassulacean Acid Metabolism (CAM) |
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Definition
occur in mesophyll cells
open stoma at night to capture CO2, but close while Calivin cycle is occurring
prevalent in desert plants |
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