Temperate grasslands and temperate deciduous forests are two different biomes that are located in the same latitudes. Which one of the following abiotic conditions is most likely to account for the differences in their community composition?
A. a rain shadow
B. sunlight
C. soil nutrients
D. temperature
E. precipitation
Answer: E
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Analyses of molecular sequences for study of evolutionary relationships are constrained by ____
a. the fact that every base in a nucleic acid serves as a separate, independent character for analysis b. the presence of many genes that have been conserved by evolution c. the limited number of nucleotide characters, making it difficult to determine whether genetic similarities between species are homoplastic or homologous d. the usefulness of genes for studying only closely related species that have minor morphological differences e. nucleic acids that are not directly affected by the developmental or environmental factors that cause nongenetic morphological variations
An airfoil provides lift because air moving over a wing must travel
A) a greater distance than air moving under the wing, creating a lower pressure system above the wing. B) a greater distance than air moving under the wing, creating a higher pressure system above the wing. C) a lesser distance than air moving under the wing, creating a lower pressure system above the wing. D) a lesser distance than air moving under the wing, creating a higher pressure system above the wing.
Tests that take place in the lab, such as in a test tube or Petri-dish, outside of a living host, are referred to as _______________ whereas tests that take place in a living host, such as in a patient, are described as ______________.
A) In loco; In vivo B) In loco; In vitro C) In vitro; In loco D) In vitro; In vivo
At the time Darwin voyaged on the HMS Beagle, the popularly accepted theory in Western culture that explained the origin of Earth's plants and animals held that the various species __________.
Fill in the blank(s) with the appropriate word(s).