When comparing the gene coding for cytochrome c in several species, it was noted that humans and chimpanzees

share the identical amino acid sequence. This means that ____.
a. humans and chimpanzees can mate and produce viable offspring
b. humans evolved from chimpanzees
c. over time, chimpanzees will eventually evolve into primitive humans
d. humans and chimpanzees are closely related in evolutionary time
e. chimpanzees will eventually evolve to become human


ANSWER: d

Biology & Microbiology

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If a solution contains fewer hydrogen ions than hydroxide ions, the solution can be described as ________.

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Several epidemic microbial diseases of earlier centuries incurred high death rates because they resulted in severe dehydration due to vomiting and diarrhea. Today they are usually not fatal because we have developed which of the following?

A) antiviral medications that are efficient and work well with most viruses B) intravenous feeding techniques C) medications to slow blood loss D) hydrating drinks with high concentrations of salts and glucose

Biology & Microbiology

Trypanosoma is an organism that causes african sleeping sickness and is transmitted to a human by a ____

a. mosquito b. tsetse fly c. kissing bug d. tick e. none of the above

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Which of the following is a component of phloem?

A. Tracheids B. Sclerenchyma cells C. Epidermal cells D. Cork cambium E. Collenchyma cells

Biology & Microbiology