In which of the following cell types do G1 and G2 not take place?
a. Early embryonic cells
b. Budding yeast cells
c. Typical proliferating human cells
d. Skin fibroblasts
Ans: a. Early embryonic cells
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a. photic zonation b. longitudinal zonation c. vertical zonation d. substrate zonation
When cells stop responding to normal controls over growth and division they
a. begin to form a tumor. b. produce a malignancy. c. start to die. d. kill surrounding cells. e. produce scar tissue.
All EXCEPT which of the following may be
pathogens today? a. viruses b. bacteria c. fungi d. smallpox e. protozoans
Which of the following is characteristic of the developmental pattern referred to as mosaic
development? a. The cells of the adult are very different from each other. b. The fate of adult cells is predetermined in embryonic founder cells. c. Adult cells are richly interspersed with proteins. d. Embryonic cells have a wide range of possible developmental patterns. e. Embryos have a wide range of morphologies, but all look identical as adults.