What is a function of plastids?
A. Aerobic respiration
B. Environmental sensing
C. Breakdown of ATP
D. Storage
E. Waste removal
Answer: D
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The wings of birds and the wings of bats represent
a. homologous structures. b. analogous structures. c. homoplastic structures. d. vestigial structures. e. structures that are homoplastic but with homologous components.
The molecular switch that controls gene expression is known as:
a. the operon. b. controller. c. the operator. d. repressor. e. inducer.
Which statement about a secondary immune response is FALSE?
a. It is a response to an antigen. b. It may occur years after a primary response. c. It involves memory cells. d. It has a longer latent period than a primary response. e. It is stimulated by less antigen than in a primary response.
Cells of the central nervous system that are in direct contact with the capillaries are:
a. astrocytes b. ependymal c. oligodendrocytes d. microglia cells