At about how many weeks of pregnancy is a chorionic villus sampling performed?
a. eight
b. ten
c. fourteen
d. sixteen
e. twenty
A
Biology & Microbiology
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Meiosis in a diploid organism typically produces _____
a. two diploid cells b. four diploid cells c. four haploid cells d. two haploid cells e. one triploid cell
Biology & Microbiology
The respiratory pacemaker is located in the _____
a. lungs b. cerebral cortex c. brain stem d. bronchioles e. alveoli
Biology & Microbiology
The amplitude of a sound wave corresponds to ____
a. loudness b. direction c. frequency d. timbre e. pressure
Biology & Microbiology
Who was Aldo Leopold?
A) a conservationist B) a statistician C) a hunter D) a marine biologist
Biology & Microbiology