The advantage of bilateral symmetry is that it allowed for the evolution of

A. cephalization.
B. appendages.
C. parasites.
D. reproductive structures.


Answer: A

Biology & Microbiology

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One interesting and surprising finding regarding the regulation of the ara operon is that it is under both positive and negative control. What protein is responsible for the dual action of this operon?

A) AraC is responsible for both the positive and negative control of the ara operon. B) RNA polymerasse is responsible for both the positive and negative control of the ara operon. C) AraD is responsible for both the positive and negative control of the ara operon. D) DNA polymerase is responsible for both the positive and negative control of the ara operon. E) AraBAD is responsible for both the positive and negative control of the ara operon.

Biology & Microbiology

Which of the following statements is true of

the proteobacteria? a. They are the most diverse group of bacteria. b. Some are photoautotrophs. c. Some are chemoautotrophs. d. Some are chemoheterotrophs. e. All of these are true

Biology & Microbiology

Energy is defined as the capacity to do work

Indicate whether the statement is true or false

Biology & Microbiology

In regards to altruism, what way are humans like vampire bats?

A. They engage in reciprocal altruism. B. Their altruism is based on kin selection. C. Their altruism is based on haplodiploidy. D. They are both Chiroptera.

Biology & Microbiology