Two-thirds of the available freshwater is
a. used as drinking water for animals.
b. used as drinking water for humans.
c. used for irrigation.
d. wasted.
C
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Viruses infect every organism that has been investigated for their presence. However, viruses can only replicate in
A. very limited conditions, depending on their capsid type. B. a very limited manner if they are a retrovirus. C. a very limited manner depending on their envelope capability with the host's cell membrane or cell wall. D. their lytic stage outside the host cell membrane. E. a very limited number of the host's cells.
What DNA site can increase the transcription rate of a gene that may be thousands of base pairs away?
a. transcription factor b. silencer c. enhancer d. activator e. transcription increaser
During active transport, solutes are moving _______.
a. down their concentration gradient b. toward equilibrium c. against their concentration gradient d. it depends on what is being transported
You observe a cell under a microscope and you can clearly see a cell wall, a vacuole, and cytoplasmic connections. These cytoplasmic connections must be
A) plasmodesmata. B) desmosomes. C) gap junctions. D) osmotic channels. E) tight junctions.