Cells are genetically programmed to die, responding to cell signals that can come from outside or inside the cell. This process is called necrosis and is a normal way to regulate cell numbers during fetal development and within tissues and organs after birth
a. true
b. false
b. false
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This figure depicts the Briggs experiment, in which he tested the hypothesis that light causes auxin to move to the shaded side of seedlings. Based on what you remember about this experiment, which shoot do you expect to bend the most?
A. Shoot A.
B. Shoot B.
C. Shoot C.
D. Shoot D.
Aerobic bacteria most likely evolved ____
a. directly from early protocells b. around hydrothermal vents c. later than cyanobacteria d. in a prebiotic soup e. through the process of endosymbiosis
According to the endosymbiotic theory, ___________ evolved from free-living prokaryotic cells.
A. nucleoli B. mitochondria C. ribosomes D. Golgi bodies
Character states shared by the ancestor or outgroup of a clade are called
A. derived traits. B. synapomorphies. C. plesiomorphies. D. homoplasies. E. symplesiomorphies.