Which of these is in the right order?
a. biosphere, ecosystem, cell, tissue.
b. community, molecule, atom, organ.
c. biosphere, organelle, molecule, atom.
d. ecosystem, community, biosphere, cell.
Answer: c. biosphere, organelle, molecule, atom.
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Which objective would be best to use a Southern blot rather than a Northern blot?
A) Determine if a gene is present in a genome. B) Discover gene function. C) Identify regulatory gene-protein interactions. D) Quantify expression profiles of a gene.
An instrument that magnifies slight differences in the refractive index of cell structures is called a (n) ________ microscope.
A. phase-contrast B. densitometric C. electron D. fluorescence
Populations of endotherms that live in colder climates tend to have shorter ears and limbs than populations of the same species in warm climates. This is called ____________ Rule.
A. Allen's B. the K-Selected C. the r-Selected D. Edward's
Perhaps the greatest asset possessed by early
hominids was a. their use of many different kinds of foods. b. the ability to walk without using the forelimbs. c. a heavy, muscular build. d. the ability to reason and learn. e. less hair on the body.