Temperate grasslands are typically nestled between the ________ and ________ biomes
a. desert, temperate forests
b. desert, coniferous forest
c. tundra, coniferous forests
d. desert, rainforests
e. temperate forests, tundra
a
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Population size declines when ________
a. the sum of births and immigration is less than the sum of deaths and emigration b. death rates are higher than birth rates c. immigration is higher than emigration d. the value for r is greater than 0
How many prokaryotic species have been grown and studied in the laboratory
A) about 20% of the known species B) all of them C) none of them D) over half of the known species E) less than 1% of the known species
A veterinary hospital had an outbreak of Salmonella infantis. Within the facility, how can Salmonella be spread?
A. unwashed hands B. contaminated objects C. multiple animals using the same stalls without proper cleaning D. feces E. All of these choices are correct.
True or false: If natural selection is the driving force for speciation of two competing subspecies, you would expect to see a bell-shaped distribution of the phenotypes being selected
A. true B. false