The genomes of human beings and chimpanzees are nearly identical, so why are humans and chimps so different?
A) The micro RNAs destroy DNAs in chimps.
B) The regulatory sequences are different in the two species.
C) The genes of chimps make different proteins.
D) Out of 907 genes in the liver of both humans and chimps, only half are active in chimps.
E) The micro RNAs destroy mRNAs in chimps.
Answer: B
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Pinworm is a nematode parasite that lives in the human rectum, and causes itching in the anal area. What best explains the itching symptom?
A. Any kind of parasite will naturally irritate the skin. B. The itching induces the person to scratch, helping to spread the parasite to another person. C. The itching is a side-effect when the immune system has successfully attacked the nematode. D. The itching is because of the mismatch between humans and the parasite’s natural host. 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 nematode diseases? 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?
If a virus-injected gene interrupts a growth control gene, ____ could result
a. diabetes b. cancer c. hemophilia A d. sickle-cell anemia e. heart attack
A hot air balloon derives its lift property of fluids as stated by
What will be an ideal response?
An airfoil provides lift because air moving over a wing must travel
A) a greater distance than air moving under the wing, creating a lower pressure system above the wing. B) a greater distance than air moving under the wing, creating a higher pressure system above the wing. C) a lesser distance than air moving under the wing, creating a lower pressure system above the wing. D) a lesser distance than air moving under the wing, creating a higher pressure system above the wing.