1. Homologues structures are structures in different organisms that are similar because:

QUESTION 1

1. Homologues structures are structures in different organisms that are similar because:

		They share the same environments.
		They evolved from the same ancestors.
		They are not similar at all, only superficially appear so.
		None of the given asnwers are correct.

5 points   

QUESTION 2

1. Barriers to reproduction between closely related species before the sperm and egg have fused are referred to as:

		prezygotic barriers
		pseudogenomic barriers
		postzygotic barriers
		hypertrophic recombinations

5 points   

QUESTION 3

1. Beaver tend to create conditions that increase biodiversity at the landscape level.

True

False

5 points   

QUESTION 4

1. During succession of old field to forests in new England what would best describe the sequence of tree types?

		Shade tolerant, shade intolerant
		Shade intolerant, shade tolerant
		Shade intolerant, drought resistant
		Drought resistant, shade intolerant

5 points   

QUESTION 5

1. Extinction of species is a normal biological process.  Why are scientists so concerned about the current “sixth” mass extinction?

(a) The types of organisms being affected by it.

(b) The extinction rate exceeds historical extinction rates.

(c) It affects only species that are rare anyway.

(d) None of the above.

		The types of organisms being affected by it.
		The extinction rate exceeds historical extinction rates.
		It affects only species that are rare anyway.
		None of the given answers are correct.

5 points   

QUESTION 6

1. What are the types of processes that can lead to the generation of new species in geographically isolated populations?

		a. polyploidy
		b. the shifting of the course of a river.
		c. host races in insects.
		d. both a and b
		e. both a and c

5 points   

QUESTION 7

1. Which agent of disturbance is the most important in New England forests?

		Wind.
		Fire.
		Water.
		Ice.

5 points   

QUESTION 8

1. A biological species must have which of the following characteristics?

		a. A population whose members can freely interbreed.
		b. Members in population are from an open gene pool.
		c. Members are from a closed gene pool.
		d. a and b correct
		d. a and c correct

5 points   

QUESTION 9

1. Endemic species are found:

(a) within a limited local area.

(b) widely distributed across the planet.

(c) only in rainforests.

(d) wherever humans have disturbed habitats.

		within a limited local area.
		widely distributed across the planet.
		only in rainforests.
		where humans have disturbed habitats.

5 points   

QUESTION 10

1. What are the characteristics of an invasive speices.  Provide an example.

For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). Paragraph Arial