The molecule shown above is a(n) ____
a. amino acid
b. monosaccharide
c. steroid
d. nucleotide
e. phospholipid
D
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Measuring its costs and benefits in terms of energy spent and/or gained, which interaction(s) involve at least one individual gaining? Select all that apply
A. competition B. predation C. obligate mutalism D. facultative mutalism E. commensalism
Which of the following is not true of signal integration by more than one transcription factor?
A. It occurs in both bacteria and eukaryotes. B. It allows for multiple environmental signals to control the expression of a single gene. C. It is used to control the expression of genes in opposite orientations that are controlled by the same promoter. D. It can include the use of both repressors and activators at the same promoter.
A marine biologist visits your biology class and begins his talk entitled, "Life as a Trochophore." A friend seated next to you asks, "What is a trochophore?" You explain that a trochophore is
A. another name for the veliger stage in earthworm reproduction. B. a term used to describe a larval form of either the phylum Mollusca or Annelida. C. another name for the veliger stage in the oyster. D. similar to a lophophore, but only found in the phylum Annelida. E. a parasite in the intestines of a bivalve mollusk.
A fruit that develops from several ovaries in a single flower, such as a raspberry, is called a(n) ____
a. aggregate fruit b. accessory fruit c. multiple fruit d. simple fruit e. compound fruit