Cellular slime molds can be distinguished from plasmodial slime molds on the basis of ____
a. reproductive structures
b. spore formation
c. nuclei per cytoplasm
d. slime trails
e. food requirements
ANSWER: c
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Just as cows consume grass for nourishment, bees consume ___
a. pollen b. nectar c. seeds d. a and b e. all of the above
Forests and other natural ecosystems, such as wetlands, exhibit the "sponge effect," meaning that they
A) soak up water from runoff and rainfall, and thus accumulate pollutants B) soak up pollutants from runoff and rainfall, releasing it quickly into streams and rivers and raising their levels C) soak up water from runoff and rainfall, saturating nearby ecosystems D) soak up water from runoff and rainfall, releasing it at a regular rate that moderates flooding of streams and rivers E) draw water away from rivers and streams, lowering their levels
Protists that ingest visible particles of food are called
A. phototrophs. B. saprozoic feeders. C. osmotrophs. D. phagotrophs.
Most human embryos that are aneuploid
A. are usually the result of increased nondisjunction in the gametes of older men. B. can develop and survive to adulthood. C. result in sterility. D. are spontaneously aborted in the first trimester. E. result in Down's syndrome.