Which of the following statements regarding sexual and asexual reproduction is true?
A) Cell division only occurs after sexual reproduction.
B) Only offspring from asexual reproduction inherit traits from two parents.
C) Sexual reproduction typically includes the development of unfertilized eggs.
D) Sexual reproduction is more likely to increase genetic variation than is asexual reproduction.
Answer: D
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The major reason why there are fewer antiprotozoan drugs than antibacterial drugs is because
A. antiprotozoan drugs cost much more than antibacterial drugs to develop. B. antiprotozoan drugs are only effective when injected. C. it is much more difficult to develop selectively toxic antiprotozoan drugs since protozoan cells are eukaryotic. D. antiprotozoan drugs are not needed in the United States.
The organism causing giardiasis is a
A) gram-negative spirochete. B) flagellated protozoan. C) retrovirus. D) type of yeast.
Transgenic corn that contains a gene for herbicide resistance has raised concerns about its safety and
has been kept off the market. Indicate whether the statement is true or false.
Which body system develops first in a human embryo?
A. nervous B. excretory C. reproductive D. respiratory E. circulatory