Speciation: Question Preview (ID: 1593)


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A _______________ is a group of individuals capable of interbreeding to produce fertile offspring.
a) community
b) species
c) genus
d) kingdom

Approximately how many species have been described?
a) 1 million
b) 2 million
c) 10 million
d) 2 billion

The key to speciation is _____________________of populations.
a) extinction
b) population growth
c) reproductive health
d) reproductive isolation

______________ speciation occurs when geographic isolation creates a reproductive barrier
a) sympatric
b) parapatric
c) allopatric
d) polypatric

_______________ speciation occurs when a reproductive barrier is created by something other than geographic isolation
a) sympatric
b) parapatric
c) allopatric
d) polypatric

Which one below is NOT a reproductive isolating mechanism?
a) ecological isolation
b) individual isolation
c) temporal isolation
d) behavioral isolation

Best estimates from the fossil record indicate that greater than ____% of species that have exited are now extinct.
a) 50
b) 75
c) 25
d) 99

The reproductive isolating factor that occurs when an egg and sperm are incompatible is refered to as
a) gametic isolation
b) ecological isolation
c) temporal isolation
d) behavioral isolation

The reproductive isolating factor that occurs when individuals of a species mate at different times is refered to as
a) gametic isolation
b) ecological isolation
c) temporal isolation
d) behavioral isolation

A typical “lifetime” for a species is about ____million years.
a) 1000
b) 100
c) 10
d) 1

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