All of the following methods of birth control prevent fertilization of the ovum by sperm except
A. spermicidal foams or jellies.
B. birth control pills.
C. intrauterine devices (IUDs).
D. diaphragm.
E. condoms.
Answer: C
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Transcription factors generally "read" DNA sequences through amino acid–nucleotide contacts in the major groove because:
A. there are no minor groove hydrogen bond acceptors available at A–T base pairs. B. the minor groove displays only methyl functional groups for recognition. C. there are more hydrogen bond donors and acceptors in the major groove. D. all minor groove functional groups are the same.
Tarsiers, new world monkeys, old world monkeys, and apes are all living members of which of the
following mammalian lineages?
a. Strepsirhini b. monotremes c. Rodentia d. Haplorhini e. marsupials
How does the acidity of the stomach aid in digestion?
What will be an ideal response?
Immediately inside the epidermis of a eudicot stem is the pith. Indicate whether the statement is true or false