Pattern baldness is a(n) ____ trait
a. X-linked
b. Y-linked
c. sex-linked
d. sex-limited
e. sex-influenced
e
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Bacteriophage, unlike animal viruses, often have special viral-specific enzymes carried in the capsid, which enter the host cell at the same time as the nucleic acid
Indicate whether this statement is true or false.
Which important discovery in the early 1900s enhanced food production, thus increasing human population growth?
a. cultivation of rice b. cultivation of wheat c. the wheel d. synthetic fertilizer e. penicillin
The major difference between the smooth and rough ER is that ____
a. smooth ER is isolated to the nucleus b. vesicles are found only in the smooth ER c. rough ER contains ribosomes d. smooth ER is the site of polypeptide synthesis e. rough ER is the site of lipid synthesis
Which one of the following statements about transport of nutrients in phloem is false?
a) Differences in osmotic concentration at the source and sink cause a hydrostatic pressure gradient to be formed. b) Companion cells control the rate and direction of movement of phloem sap. c) A sink may be located anywhere in the plant. d) A sink is that part of the plant where a particular solute is consumed or stored. e) Solute particles can be actively transported into phloem at the source.