The most widely used molecule in sequence-based evolutionary analyses are ________ genes

A) ATPase
B) electron transport
C) SSU rRNA
D) tRNA


Answer: C

Biology & Microbiology

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You take a sample of bacteria with DNA that contains only 14N and allow them to replicate in a medium that contains only 15N.  After 3 rounds of replication, what percent of the DNA molecules will contain one strand with only 14N and one strand with only 15N?  Enter your answer as a whole number without the percent sign.  For example, 5% would be entered as 5 and 37% would be entered as 37.  

What will be an ideal response? Clarify Question · What is the key concept addressed by the question?   · What type of thinking is required?   · What key words does the question contain?   Gather Content · What do you already know about the Meselson-Stahl experiment?   Consider Possibilities · What other information is related to the question? Which information is most useful?   Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?   Reflect on Process · 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

You are out at night and hear a sound in the bushes. The electrical signal carrying this information to your brain is carried first by a

A. sensory neuron. B. motor neuron. C. interneuron. D. glial cell. E. All of these choices are correct.

Biology & Microbiology

In the figure above, diagram 1 represents

a. a molecule of chlorophyll. b. a phospholipid in the thylakoid membrane. c. a primary electron acceptor. d. an accessory pigment. e. a carotenoid.

Biology & Microbiology

Over time, the movement of people on Earth has steadily increased. This has altered the course of human evolution by increasing _____

A) nonrandom mating B) geographic isolation C) genetic drift D) gene flow

Biology & Microbiology