The evolutionary mode in which species evolve rapidly at first and then remain stable for very long

periods of time is called



a. catastrophism.
b. uniformitarianism.
c. disruptive selection.
d. punctuated equilibrium.
e. anagenesis.


D

Biology & Microbiology

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The common ancestor that produced the most evolutionary recent derived characters is

A. 12 B. 9 C. 8 D. 6 Clarify Question 1. What is the key concept addressed by the question? 2. What type of thinking is required? 3. What key words does the question contain and what do they mean? Gather Content 1. What do you know about relatedness based on a phylogenetic tree?How does it relate to the question? Consider Possibilities 1. What other information is related to the question? Which information is most useful? 2. Which lines are the shortest? Choose Answer 1. Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process 1. Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?

Biology & Microbiology

How many genes are involved in determining

skin color? a. 1. b. 2. c. 10. d. 20. e. >100

Biology & Microbiology

Substances that cause euphoria and relieve pain are

a. depressants. b. stimulants. c. analgesics. d. hallucinogens. e. antipsychotics.

Biology & Microbiology

The association of nitrogen fixing bacteria of the genus Rhizobium with legumes such as peas is an

example of mutualism. ____________________ Indicate whether the statement is true or false.

Biology & Microbiology