Spawning depends on
A) the synchronized release of eggs and sperm into the water.
B) copulation.
C) the release of a spermatophore into the water.
D) internal fertilization.
E) asexual reproduction.
A
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A protein that is destined to reach the plasma membrane is making its way through the Golgi. At that moment, a drug was added to cells, blocking trafficking at the trans face of the Golgi. As a result, what would happen to the protein?
A. The protein would continue on to the cell surface. B. The protein would be stuck in the Golgi. C. The protein would return to the endoplasmic reticulum via the trans face of the Golgi. D. The protein would exit the Golgi, but instead be targeted to the cytoplasm.
Most species of Gram-positive bacteria are
a. photoautotrophic. b. photoheterotrophic. c. chemoautotrophic. d. chemoheterotrophic. e. photochemoautotrophic.
How can PCR be used to induce site-specific mutations in DNA?
What will be an ideal response?
According to the theory of endosymbiosis, the origin of chloroplasts probably involved:
A) the formation of colonies of cyanobacteria. B) the formation of cell walls around the photosynthetic pigments. C) engulfing of small photosynthetic prokaryotes by a larger cell. D) the accumulation of free oxygen in ocean waters. E) infolding of the cell membrane around circular pieces of DNA in the cytoplasm.