A virus infects a host cell and takes over the host’s
mechanisms of replication and __________
synthesis. Fill in the blank(s) with the appropriate word(s).
Answer: protein
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Which type of molecular movement is a passive process
A) sodium-potassium pump B) endocytosis C) exocytosis D) diffusion E) active transport
Cellular membranes are
A. fluid. B. solely composed of lipids. C. composed of a single layer of amphipathic molecules. D. selective to the transport of gases and small molecules only. E. found in eukaryotes, but not prokaryotes.
The innermost layer of the root cortex, known as the ____, is a selectively permeable barrier that helps control the
movement of water and dissolved minerals.
a. endodermis b. root cap
c. quiescent center d. pericycle e. root hairs
Which best describes the purpose of sexual reproduction?
A. to produce offspring that are non-viable B. to produce offspring that are genetically indentical C. to produce offspring that exhibit greater genetic variations D. to produce offspring that are genetically identical to their parents