The branch of biology known as evolutionary-developmental biology involves the study of:
A. the development of multicellularity.
B. how mechanisms of development have
been influenced by evolution.
C. cell-cell communication.
D. cell adhesion molecules.
B
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In the lactose operon, the repressor gene binds to:
A. the lacI coding region. B. the promoter. C. the operator. D. the lacZ coding sequence. E. the lacY coding sequence.
Which one of the following is true of the sporophyte stage of a flowering plant?
A. It is haploid. B. It is 1N. C. It is a nonphotosynthetic stage. D. It is the obvious stage such as an oak tree. E. It is dependent on the gametophyte for nutrition.
A small mass of tissue with many lymphocytes that filters lymph is the:
a. thymus b. SA node c. spleen d. lymph node e. lymphatic duct
Which of the following structure-function pairs is mismatched?
a. nucleolus-ribosome production b. lysosome-intracellular digestion c. ribosome-protein synthesis d. Golgi-protein trafficking e. microtubule-muscle contraction