One of the consequences of malnutrition is lack of vitamin B6 . Enzymatic reactions requiring ______________will be halted
A. transfer of acyl groups
B. transfer of alkyl groups
C. transfer of methyl groups
D. pyridoxal phosphate
E. tetrahydrofolate
D
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The male pine cone
(a) produces pollen. (b) contains a female gametophyte. (c) bears a megasporangium containing a megaspore mother cell. (d) gives rise to a seed.
The difference between thermal death time and thermal death point in microbicidal activity is that
A. thermal death time is the shortest amount of time required to kill an organism at a 100oC, whereas thermal death temperature is the lowest temperature required to kill an organism in 10 minutes. B. thermal death time is the greatest amount of time required to kill an organism at a specific temperature, whereas thermal death temperature is the lowest temperature required to kill an organism in 10 minutes. C. thermal death time is the shortest amount of time required to kill an organism at a specific temperature, whereas thermal death temperature is the lowest temperature required to kill an organism in 10 minutes. D. thermal death time is the shortest amount of time required to kill an organism at a specific temperature, whereas thermal death temperature is the lowest temperature required to kill an organism in 30 minutes.
Drugs used to treat malaria include ________.
A. qualaquin B. metronidazole C. chloroquine D. chloroquine and qualaquin
A disadvantage of the morphospecies concept is ________
A) it can be difficult to apply to organisms with small, difficult to distinguish features B) species definitions may become arbitrary if the concept is not applied carefully C) species definitions applied by different researchers may not be comparable D) All of these are potential problems with this species concept.