3.2 Speciation

Multiple Choice

X is a species of fish in a river. After a dam is constructed, individuals of species X upstream are separated from the individuals downstream. Gradually, the individuals in the upstream become a new species. This type of speciation is known as

• Sympatric

• Allopatric

• Inbreeding

• Outbreeding

Fill in the Blank

Populations of squirrels living in area north of the Grand Canyon do not mate with the squirrels in the south. They are isolated by a __________ barrier.

Multiple Choice

A flash flood carried a raft of Amazon ants away from their original population. There is enough distance between the two groups, that they will never meet in nature again. What type of reproductive barrier is this?

• Behavioral isolation

• Temporal isolation

• Gametic isolation

• Geographic isolation

Multiple Choice

Different finch populations lived on separate islands with different environments. They evolved to best adapt to those particular environments and can no longer mate. What type of speciation is this?

• Allopatric

• Sympatric

Multiple Select

Select the factors that lead to speciation?

• Reproductive isolation

• Genetic drift

• Inbreeding

• Adaptive radiation

Open Ended

A few individuals from a population of butterflies in a forest migrate to another forest some distance away and reproduce. A situation where the allele frequencies change from original population is known as

Open Ended

State one factor that are involved as prezygotic reproductive barriers.

Multiple Choice

Two species of birds look alike and live in the same area. Although these birds look similar, they do not mate with each other because one species performs dancing while the other sings. This is an example of

• gametic isolation

• mechanical isolation

• behavioral isolation

• habitat isolation

• temporal isolation

Multiple Choice

The flowers of pink tulips open in the morning, while the flowers of lavender tulips open in the early afternoon. The bees that pollinate these tulips cannot carry pollen back & forth between the two types of tulips because of their flowers being closed at different times of day. What type of reproductive barrier is this?

• behavioral isolation

• temporal isolation

• mechanical isolation

• gametic isolation

• habitat isolation

Poll

How much you understand about today's lesson?

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