A mutation of a segmentation gene can result in
A. duplication of body parts.
B. missing body regions.
C. replacement of one body part with another.
D. altered expression of homeotic genes.
E. A segmentation gene mutation can cause all of these changes.
E. A segmentation gene mutation can cause all of these changes.
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Comparison of a cancer cell and a normal cell reveals that ____
a. cancer cells undergo contact inhibition, normal cells do not b. cancer cells do not undergo contact inhibition, normal cells do c. cancer cells cannot metastasize, normal cells can d. regulation of mitosis is strictly regulated in cancer cells, mitosis is unregulated in normal cells. e. cancer cells remain adherent to other cells, normal cells do not
What specialized structures of the koala's digestive tract helps it to extract nutrients from cell walls, and how do they function?
What will be an ideal response?
Which of the following statements is false concerning the outermost layer of the epidermis?
a. It is the first to experience any abrasion. b. Keratin provides waterproofing. c. Millions of cells are worn off daily. d. Its cells are undergoing rapid cell division. e. It is called the stratum corneum.
The gene responsible for Marfan syndrome encodes a protein associated with ____
a. heart muscle b. connective tissue c. fat tissue d. red blood cells e. nervous tissue