In a tide pool, a student encounters an organism with a hard outer covering that contains much calcium carbonate, an open circulatory system, and gills. The organism could potentially be a crab, a shrimp, a barnacle, or a bivalve
The presence of which of the following structures would allow for the most certain identification of the organism? A) a mantle
B) a heart
C) a body cavity
D) a filter-feeding apparatus
A
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If the inner membrane of the mitochondria were compromised in some way, what effect would this have on cellular
respiration?
a. The transport of electrons across the inner mitochondrial membrane would not occur. b. The proton gradient across the inner mitochondrial membrane would dissipate.
c. The ATP synthase enzyme would relocate to the mitochondrial matrix. d. The cell would generate more ATP. e. ATP would no longer be made anywhere in the cell by any mechanism.
The slow drifting of sections of the earth's crust, sometimes separating, other times colliding, is known as ________.
A. plate tectonics B. crust dynamics C. continental divergence D. continental convergence
A polar molecule moves across a membrane from a region of high concentration to a region of low concentration by a process called
A. simple diffusion. B. facilitated diffusion. C. active transport. D. phagocytosis.
Consider the cladogram shown. Which pair of species shares the greatest number of derived characters (synapomorphies)?
A. 2 and 3 B. 2 and 4 C. 6 and 5 D. 1 and 4 E. 6 and 4