Exam 17: Speciation and Macroevolution

Male fireflies are recognized by females of their species by the pattern of their flashings, while male crickets are recognized by females of their species by their chirping. These are examples of _____.

In which model of evolution are many transitional forms predicted?

Descriptions of new species of insects are more likely to contain diagrams of the shape of the male genitalia than head, wing, or leg parts. Why?

Some genes can bring about radical changes in body shape and organs. The Pax6 gene is one such gene and is involved in

Reinforcement would eventually

The process in which natural selection favors the continual development of prezygotic isolating mechanisms is called

Two species of the garter snake in the genus Thamnophis are found in the same geographic region. These species are not likely to meet and attempt to reproduce because one lives mainly in the water, while the other species spends most of its time on land. This is known as

A major disadvantage of the evolutionary species concept is that it

Animal diversity is due to variations in the expression of ancient genes in addition to the evolution of new and different genes.

The ______________ was proposed to help explain speciation that appears in the fossil record.

Why is the use of morphological traits to distinguish species considered to be a disadvantage?

Which of the following scenarios is explained by adaptive radiation?

The biological species concept is limited, and may not be applied to

______ is said to occur when a similar trait evolves in two unrelated species while ______ is when a species evolves in response to another species.

Sympatric speciation in plants, as a result of ________, is well documented.

Which figure depicts a punctuated equilibrium model of evolution?

A reproductive isolation mechanism includes any structural, functional, or behavioral characteristic that blocks reproductive ability.

Study the chart of the mating seasons of these five species of frogs. What factor keeps the frogs reproductively isolated? What other factors may be involved?

In some plants, the sperm can not reach the egg because the stigma prevents formation of the pollen tubes. This is an example of

Isolating mechanisms that prevent reproductive attempts or make it unlikely that reproductive attempts will be successful are referred to as