In the human male, the tube used to carry both sperm and urine is the
A. urethra.
B. fallopian tube.
C. ureter.
D. seminiferous tubule.
E. vas deferens.
Answer: A
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You are conducting a genetic screen using Caenorhabditis elegans embryos to isolate mutations affecting anaphase (A). Therefore, you need to look for embryos in which
A. the centromeres do not move toward the poles. B. the poles do not move apart. C. the spindle apparatus does not disassemble. D. sister chromatids are mismatched and therefore fail to separate.
The only photosynthetic tissue is ________
a. mesophyll b. sclerenchyma c. xylem d. collenchyma
The relationship between biomass and primary productivity is that:
a. biomass is the rate of primary productivity b. biomass is the inverse of primary productivity c. biomass is the natural log of primary productivity d. primary productivity is the inverse of biomass e. primary productivity is the rate at which biomass is produced
A harmless insect that looks like a dangerous one in order to fool its predators is an example of _______.
a) parasitism b) mutualism c) mimicry d) camouflage