In retroviruses, DNA is synthesized from an RNA template using which enzyme?
What will be an ideal response?
reverse transcriptase
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Which would be most likely to be fossilized?
A. a common large worm. B. a common thick-shelled crustacean. C. an herbaceous plant that is only found at very high altitudes. D. a rare, desert-dwelling lizard.
Answer the following statements true (T) or false (F)
1. More conservation spending has led to greater recovery of black rhinoceros numbers. 2. The United States contains at least one biodiversity hot spot. 3. The passenger pigeon went extinct due to an introduced parasite. 4. The number of extinctions of birds and mammals has gone up as human populations have increased. 5. The introduction of avian malaria to Hawaii was responsible for the extinction of almost half of Hawaii's native birds.
If a person has a portion of number 5 chromosome missing, they may have
A) down syndrome. B) cri du chat syndrome. C) Turner syndrome. D) Klinefelter syndrome. E) Jacobs syndrome.
When biologists use the terms fitness or fittest they are talking about __________.
a. how long an individual lives b. passing genes on to the next generation c. how healthy an individual is d. how strong an individual is