The aphotic zone of a lake is inhabited primarily by phytoplankton
Indicate whether the statement is true or false
FALSE
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Reciprocal translocations can affect gene dosage because:
A. the genes involved in the translocation are nonfunctional. B. the two chromosomes involved in the translocation may not assort together during meiosis. C. the two chromosomes involved in the translocation always assort together during meiosis. D. reciprocal translocation involves the duplication of one set of genes and the deletion of another set of genes. E. none of these
Spy hopping behavior is thought to be for
a. mating. b. observing objects other than whales on the surface. c. capturing their food. d. attracting a mate. e. communicating with podmates.
Which of the following pieces of evidence most strongly supports the common origin of all life on Earth?
A. All organisms show heritable variation. B. All organisms reproduce. C. All organisms use essentially the same genetic code. D. All organisms have undergone evolution. E. All organisms require energy.
Which of the following is not true of viroids?
A. Viroids are small circular ssRNA molecules. B. Extracellular viroids have a lipid bilayer envelope. C. Viroid RNA does not serve as mRNA nor does it direct the synthesis of mRNA. D. Viroids have no protein capsids.