As an embryo develops, new cells are produced as the result of
A) differentiation.
B) preformation.
C) cell division.
D) morphogenesis.
E) epigenesis
Answer: C) cell division.
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Which of the following is an example of how cultural change influences evolution?
A. Africans being carriers for sickle trait in areas where malaria is present B. Inuits in Greenland having a larger body, reducing surface area to volume C. people in the northern regions having less pigmentation in order to obtain more vitamin D D. people becoming lactose tolerant in areas where the domestication of cattle occurred
Which of the following serves as a connection between the nervous and endocrine systems?
A. hypothalamus B. pineal gland C. thyroid gland D. pancreas E. adrenal gland
Which of the following statements regarding vaccines as disease preventatives is incorrect?
A. There is currently no smallpox vaccine available to the general public. B. Immunization is currently not possible against Clostridium perfringens. C. Zostavax is recommended for older adults to prevent shingles. D. The Carter Center has promoted the development of a vaccine against river blindness.
Which researcher would be most accurately described as engaging in reproductive cloning?
A. Conseula's research is focused in generating new bone tissue from iPS cells. B. Peter is trying to clone particularly large bull. C. Roger works in a lab that is trying to induce the formation of pancreatic cells. D. Shelly wants to induce cells to form new neural tissue.