The type of bond that would form from the transfer of an electron from one atom to another, shown below, is a(n) ________ bond.
a. ionic
b. covalent
c. hydrogen
d. isotopic
d. atomic
Answer: a. ionic
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Leaks between adjoining cells are stopped by rows of proteins most specifically defined as ________ junctions
a. tight b. cell c. gap d. adhering
For Mendel's explanation of inheritance to be
correct, a. the genes for the traits he studied have to be located on the same chromosome. b. the combination of gametes at fertilization has to be due to chance. c. genes cannot be transmitted independently of each other. d. only diploid organisms demonstrate inheritance patterns. e. none of these apply.
Ribosomal RNA:
A) is a double-stranded helix B) may act a ribozyme during protein synthesis C) retrieves amino acids and brings them to the ribosome for incorporation into a growing protein D) may have double stranded regions due to hairpin loop formations E) carries the genetic
Which idea is central to the biological species concept?
A. Vicariance B. Sexual selection C. divergent phenotypes D. reproductive isolation E. distinct lineages