(Q).
Q: What measure is resorted to by people who wish to screen out genetic abnormalities in the fetus? Choices: - contraceptive use - in vitro fertilization - stem cell therapy - prenatal testing A:
(A).
prenatal testing

(Q).
Q: An electrical signal along a nerve cell triggers the secretion of what? Choices: - conduction molecules - axons - attenuation molecules - neurotransmitter molecules A:
(A).
neurotransmitter molecules

(Q).
Q: What forms when a glacier scrapes a large hole in the ground? Choices: - frozen lake - drift lake - melting lake - glacial lake A:
(A).
glacial lake