Eugenic laws were enacted in an attempt to
A. prevent some individuals from reproducing.
B. eliminate "bad genes" from the human population.
C. improve the human gene pool.
D. All of these answers are true.
D. All of these answers are true.
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Chromatin consists of ____
a. DNA only b. DNA, RNA, and protein c. DNA and RNA d. RNA and protein e. DNA and protein
Which of the following health problems might be cured with embryonic stem cell treatment? a. Muscular dystrophy b. All of these choices
c. Heart disease d. Parkinson's disease e. Blindness
The banded tetra, a kind of fish found in tropical streams, is a(n) _______ species because it provides nearly all the necessary phosphorus to the other species in its community, and its disappearance from the community would have detrimental effects on the other species that live there.
a. invasive b. foundation c. pioneer d. keystone
A water strider walks across a pond on________
Fill in the blank(s) with the appropriate word(s).