Which activity may be helpful in reducing dependency on inorganic fertilizers?
A. nitrogen fixation
B. leaching
C. weathering
D. composting
E. chlorosis
Answer: D
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During sexual reproduction in zygomycetes two hyphae will fuse to form a ________ that is ________ in its genetic material
a. spore, haploid b. zygospore, diploid c. zygospore, dikaryotic d. zygote, dikaryotic e. zygospore, haploid
Species richness refers specifically to
a. the numbers of individuals of each species present. b. the ability of larger animals to enrich themselves by successfully preying on smaller ones. c. the number of different species in the habitat. d. the feeding levels at which the animals are located. e. none of these.
Which of the following is NOT key evidence for a large meteorite impact striking the Earth approximately 65 million years ago?
A) tiny particles of glass called microtektites B) "shocked quartz" grains, with fine parallel planes caused by a burst of intense pressure C) the disappearance of many taxa of large reptiles beginning about 70 million years ago D) a worldwide layer of sediments highly enriched in the element iridium E) gravity anomalies that allow us to map the now-buried meteorite crater
Clams and other bivalves typically have:a
dermal gills. b. gills adapted for trapping food. c. an operculum. d. book lungs. e. swim bladders.