Which of the following is involved in proofreading during DNA replication?
A) 5' to 3' exonuclease activity of DNA polymerase
B) 3' to 5' exonuclease activity of DNA polymerase
C) 5' to 3' endonuclease activity of DNA polymerase
D) 3' to 5' endonuclease activity of DNA polymerase
E) RNA polymerase
Answer: B
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Male hummingbirds flash a patch of iridescent feathers on their neck called the gorget. This behavior makes them very visible. Why advertise their presence to a predator?
A. Hummingbirds are so fast that predation is not a large factor for them. B. Predators cannot see colors so are not alerted. C. The benefits of defending a territory exceed the costs of predation. D. This is an example of a maladaptive behavior that decreases overall fitness. Clarify question: What is the key concept addressed by the question? What type of thinking is required? Gather Content: What do you already know about the tradeoff of being visible to potential mates and predators? What other information is related to the question? Answer: Given what you now know, what information is most likely to produce the correct answer? Reflection: 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?
Replication of DNA is semi-conservative.
a. true b. false
Your friend has trouble distinguishing the color red from the color green. You explain that he is color-deficient because his eyes
A) have larger blind spots than normal. B) are too elongated or have a cornea that is too round. C) were damaged by bright sunlight. D) do not have the photopigments stimulated by red or green light. E) have rods but no cones.
Which organism is the most photosynthetically productive living organism that forms underwater forests over 100 meters long?
A. diatoms B. brown algae C. golden algae D. red algae E. green algae