Describe two mechanisms of evolution and how they lead to new species?
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Question

Describe two mechanisms of evolution and how they lead to new species?

Populations of species that occupy the same geographic area and interact with each other are collectively called a(n)

community.

biosphere.

population.

drift.

ecosystem


The population size of a particular species that an ecosystem can sustain indefinitely (assuming a stable environment) is called its

habitat distribution.

climax community.

environmental range.

growth rate.

carrying capacity.


Which of the following will directly release CO2 into the atmosphere? More than one answer may be correct, choose all that are correct.

oceans

producing electricity by burning coal

aerobic respiration

engines that burn gasoline or diesel

photosynthesis


In the nitrogen cycle which organism produces most of the usable nitrogen on earth?

bacteria

plants

dead animals

animals


Which of these is not evidence for evolution?

fossils

DNA similarities

vestigial organs

wings


Phylogenetic trees are used to trace the history of speciation and evolution.

True

False


All life on earth is descended from a 

all of these

common ancestor

virus

fungus


Natural selection can lead to new species only be acting on ________ traits.

chemical

physical

existing

any

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