In the Section "Investigating Life: Birds Do It,Bees Do It",the

question 40

Multiple Choice

In the section "Investigating Life: Birds Do It,Bees Do It",the experiment supports that a change in just one gene locus may have jump-started speciation in Mimulus.This is an example of

• A)pre-zygotic barriers to reproduction.
• B)post-zygotic barriers to reproduction.
• C)gradualism.
• D)punctuated equilibrium.
• E)asexual reproduction.

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Definitions:

Genomic Imprinting

An epigenetic phenomenon by which certain genes are expressed in a parent-of-origin-specific manner, affecting the phenotype of an organism without altering the DNA sequence.

David Haig

An evolutionary biologist known for his work on genetic conflict, parental investment theories, and the evolutionary origins of genomic imprinting.

Placenta

A temporary organ that connects the developing fetus to the uterine wall to allow nutrient uptake, thermo-regulation, waste elimination, and gas exchange via the mother's blood supply.

Eurasian Penduline Tit

A small passerine bird known for its unique breeding behavior and the elaborate nests built by males to attract females.