In a monohybrid cross AA × aa, what proportion of heterozygotes is expected among the F2 offspring?
A) 1/4
B) 1/2
C) 3/4
D) All are heterozygotes.
E) None are heterozygotes.
B) 1/2
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Water typically makes up about what percentage of a plant?
A. 80% B. 50% C. 90% D. 100% E. 40%
The number of different amino acids is:
a. 10. b. 20. c. 30. d. 40. e. 50.
The transfer of electrons from one compound to another is equivalent to ____ transfer
a. heat b. energy c. oxygen d. enzymatic e. phosphorus
Many of water's emergent properties, such as its cohesion, its high specific heat, and its high heat of vaporization, result from the fact that water molecules _____.
a. are very small b. are in constant motion c. are attracted to each other by partial negative and positive charges on the oxygen and hydrogen atoms, respectively d. are extremely large e. tend to repel each other