Why are modern humans unlikely to evolve into separate species?

They are incompletely isolated.

Which factor would NOT lead to allopatric speciation?

Gene flow between the two populations is significant.

Which of the following can lead to sympatric speciation?

A mutation that leads to new, fertile organisms.

Why is the biological species concept not useful for fossils?

It's not possible to test reproductive isolation.

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Unit 2 Speciation

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Answers

1
Why are modern humans unlikely to evolve into separate species?
They are incompletely isolated.
They have reached the maximum level of evolution.
We don't want to add a new topic to learn in AP Bio.
Their environment is unlikely to change.
2
Different species of Hawaiian honeycreepers live in Hawaii. What led to the different species?
convergent evolution
geographic isolation
the Bottleneck effect
gene flow
3
The founder effect is an example of a situation where ___ would occur
Sympatric Speciation
Allopatric Speciation
Allosteric Speciation
Reduced Hybrid Fertility
4
In order for one species to diverge into two there must be...
A physical barrier between them
Reproductuve Isolation
Gradualism
A natural disaster
5
Mass extinction events are followed by
adaptive radiation
convergence of spp.
global climate change
great extinctions
6
What type of reproductive barrier separates animals that live in different locations?
temporal isolation
behavioral isolation
postzygotic isolation
habitat isolation
7
Two similar birds do not mate because they use different mating dances. What kind of barrier?
Mechanical Isolation
Reduced hybrid fertility
Behavioral Isolation
Habitat Isolation
8
Which species is the outgroup on this phylogenetic tree?
Canis lupus
Lutra lutra
Panthera pardus
Canis latrans
9
When one species evolves into many species to fill ecological niches it is called...
Sexual Selection
Polyploidy
Behavioral Isolation
Adaptive Radiation
10
What groups of organisms are animals most closely related to?
Cyanobacteria
Flagellates
Slime molds
Fungi
11
Which factor would NOT lead to allopatric speciation?
The separated population is small.
Mutations distinguish the two gene pools from each other.
Gene flow between the two populations is significant.
A population becomes geographically isolated.
12
Adaptive radiation is likely to occur after...
Genetic Drift
An environment has been stable for a long time
An allopatric speciation event
An extinction event
13
Two similar fish can produce offpring, but they are weak and die soon. What barrier is this?
Hybrid breakdown
Reduced hybrid fertility
Gametic Isolation
Reduced hybrid viability
14
Which current species is most closely related to Lutra lutra?
Panthera pardus
Canis lupus
Canis latrans
Taxidae taxus
15
Which of the following can lead to sympatric speciation?
A natural disaster cuts off contact between organisms.
A mutation that leads to new, fertile organisms.
A flood forms a river and separates a population.
Migration of a small number to a distant area.
16
Why is the biological species concept not useful for fossils?
It's impossible to determine the type of habitats occupied.
It's not possible to test reproductive isolation.
It's not possible to distinguish males from females.
Fossils aren't preserved well enough to determine species.

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