The hantavirus contains a ________ genome
A) ssRNA
B) dsRNA
C) ssDNA
D) dsDNA
Answer: A
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Which of the following is not true concerning the fetus during the third month of development?
A. It is possible to distinguish males from females. B. Fingernails, nipples, eyelashes, eyebrows, and hair on the head appear. C. Bone begins to be replaced with cartilage in certain areas of the skeleton. D. The nose, eyes, and ears are present. E. Head growth slows down as the rest of the body increases in length.
The primary consumers in natural communities are
a. herbivores. b. carnivores. c. scavengers. d. decomposers. e. all of these.
The taste referred to as "meaty" is caused by
A. the presence of the amino acid, glutamate. B. alkaline substances. C. sugars. D. any kind of ions.
In some social insects, there are individuals that do not mate or may not be fertile but help look after other members of their group. Which statement regarding this situation is true?
A) Natural selection cannot act on the genes of nonreproducers since they do not leave offspring. B) The ultimate cause of this behavior is the need to keep their group safe. C) By protecting relatives, the nonreproducers increase the probability that their genes will be passed to the next generation. D) Lack of mating is an agonistic behavior.