what are three traits common to most animals

heterotrophic, multicellular eukaryotes, no cell wall

how did ediacaran biota differ from cambrian animals

ediacaran= soft bodied organisms, cambrien= hard bodied, bilateral symmetry and predator/prey relationships

whats the difference between protosomes and deuterostomes?

protosomes- mouth develops first, deuterostomes- anus develops first

name the 3 types of body symmetry and example

asymmetry-sponge, radial- cnidarian, bilateral- humans

diploblastic vs triploblastic?

diploblastic= 2 germ layers, triploblastic= 3 germ layers

define pseudocoelomate

coelom not fully lined by mesoderm

three adaptations of life on land

amniotic egg, ribcage ventilation of lungs, less permeable skin

key traits of amphibians

jelly-coated eggs, many have gill breathing larvae, moist skin for gas exchange

Key traits of reptiles?

Scales, internal fertilization, lay eggs on land, ectothermic

Feathers, hollow bones, toothless beaks, endothermic, high metabolism

Key traits of mammals?

Hair, mammary glands, endothermy, specialized teeth

Study of interactions between organisms and their environment

List the 4 levels of ecological organization from small to large

Population → Community → Ecosystem → Biosphere

Biotic vs abiotic factors?

Biotic = living components. Abiotic = non-living chemical/physical factors

3 types of population dispersion + cause

Clumped = resources/mating/group defense. Uniform = territorial antagonism. Random = no strong attraction/repulsion

Define population density vs distribution

Density = # individuals per unit area. Distribution = size, shape, location of area occupied

Describe Type I, II, III survivorship curves

Type I = high survivorship early/mid life, die old, humans. Type II = even death rate throughout life. Type III = high death early, survivors live long

Exponential vs logistic population growth?

Exponential = J-curve, unlimited resources. Logistic = S-curve, limited resources, levels off at carrying capacity

Density-dependent vs density-independent factors?

Dependent = biotic, affected by population density, disease/competition. Independent = abiotic, not affected by density, weather/fire

Association of populations of different species that live and interact in same place

4 main types of interspecific interactions?

Commensalism, mutualism, exploitation, competition

Species richness vs species evenness?

Richness = # of species in community. Evenness = relative abundance of species

What do trophic levels show?

Position in food chain; how energy moves through ecosystem

Primary vs secondary productivity?

Primary = energy captured by producers. Secondary = energy assimilated by consumers

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biology exam 3

Question	Answer
what are three traits common to most animals	heterotrophic, multicellular eukaryotes, no cell wall
how did ediacaran biota differ from cambrian animals	ediacaran= soft bodied organisms, cambrien= hard bodied, bilateral symmetry and predator/prey relationships
whats the difference between protosomes and deuterostomes?	protosomes- mouth develops first, deuterostomes- anus develops first
name the 3 types of body symmetry and example	asymmetry-sponge, radial- cnidarian, bilateral- humans
diploblastic vs triploblastic?	diploblastic= 2 germ layers, triploblastic= 3 germ layers
define acoelomate	no coelom
define pseudocoelomate	coelom not fully lined by mesoderm
define coelomate	true coelom in mesoderm
three adaptations of life on land	amniotic egg, ribcage ventilation of lungs, less permeable skin
key traits of amphibians	jelly-coated eggs, many have gill breathing larvae, moist skin for gas exchange
Key traits of reptiles?	Scales, internal fertilization, lay eggs on land, ectothermic
Key traits of birds?	Feathers, hollow bones, toothless beaks, endothermic, high metabolism
Key traits of mammals?	Hair, mammary glands, endothermy, specialized teeth
Define ecology	Study of interactions between organisms and their environment
List the 4 levels of ecological organization from small to large	Population → Community → Ecosystem → Biosphere
Biotic vs abiotic factors?	Biotic = living components. Abiotic = non-living chemical/physical factors
3 types of population dispersion + cause	Clumped = resources/mating/group defense. Uniform = territorial antagonism. Random = no strong attraction/repulsion
Define population density vs distribution	Density = # individuals per unit area. Distribution = size, shape, location of area occupied
Describe Type I, II, III survivorship curves	Type I = high survivorship early/mid life, die old, humans. Type II = even death rate throughout life. Type III = high death early, survivors live long
Exponential vs logistic population growth?	Exponential = J-curve, unlimited resources. Logistic = S-curve, limited resources, levels off at carrying capacity
Density-dependent vs density-independent factors?	Dependent = biotic, affected by population density, disease/competition. Independent = abiotic, not affected by density, weather/fire
Define a community	Association of populations of different species that live and interact in same place
4 main types of interspecific interactions?	Commensalism, mutualism, exploitation, competition
Species richness vs species evenness?	Richness = # of species in community. Evenness = relative abundance of species
What do trophic levels show?	Position in food chain; how energy moves through ecosystem
Primary vs secondary productivity?	Primary = energy captured by producers. Secondary = energy assimilated by consumers

Created by: user-2008881

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