Cardiac muscle cells have gap junctions between adjacent cells. What is the function of those gap junctions?
A. They maintain isotonic conditions.
B. They facilitate cell-cell adhesion.
C. They are involved in cell-cell
communication of the cells of the heart.
D. They make nutrients, like glucose, readily
available to the muscle cells of the entire
heart.
C
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Polyploidy can result when
A) a translocation occurs between two chromosomes. B) one pair of homologous chromosomes does not separate during meiosis. C) a developing gamete is haploid. D) a haploid sperm fertilizes a diploid egg.
Advantages of bipedalism include
A. movement through the treetops and clinging to vines. B. the ability to run faster. C. freeing of hands to carry objects and ability to use tools. D. increased brain size. E. All answers are correct.
What disadvantage does sound communication have?
What will be an ideal response?
Two populations that have been separated by a river are most likely to become separate species if
A) fur color is different in the two populations. B) genes controlling ear development become different so that members of one population have much longer ears than the other. C) genes controlling molecules on the surface of the sperm that bind with egg receptors are different in the two populations. D) feeding habits are different in the two populations.