Figure 23.12
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The structure labeled "2" in the figure is a(n) ____.
A. mycelium
B. zygote
C. ascus
D. gill from the underside of a mushroom
E. spore sac
Answer: A
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For filtration to take place through the fenestrated capillaries of the renal corpuscle, _____
A) the concentration of ions must be greater in the capillaries (the glomerulus) than in the renal tubule B) there must be a greater pressure inside the glomerulus than in the renal tubules C) there must be a larger concentration of proteins in the renal tubule than in the glomerulus D) there must be more than one capillary bed in the renal corpuscle
Genes that are expressed only when needed are
A) unregulated. B) mutations. C) inducible. D) constitutive. E) anabolic.
The benefits of many pesticides are often short-lived, and their amounts must be increased for continued effectiveness because:
A) they react with their own breakdown products. B) they select for evolution of resistance in target organisms. C) they interact with other pesticides already in use. D) they interact with various fertilizers applied to the same fields.
Which type of skeleton is found in a sea stars?
A. Cartilaginous B. Exoskeleton C. Hydrostatic D. Chitinous E. Endoskeleton