For natural selection to occur, there must be competition for resources, competition for survival, or different reproductive success. Why is this so?
A) Natural selection acts on the different abilities of individuals to survive and pass on their genes to the next generation.
B) Without competition, there is no pressure to mutate.
C) Populations evolve to preserve the species and don't change unless they must.
D) The struggle of competition makes individuals stronger.
Answer: A
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Lysogeny always requires integration of the viral genome into the host chromosome.
Answer the following statement true (T) or false (F)
The information storage molecules of cells are called
A. phospholipids. B. nucleic acids. C. proteins. D. hormones. E. enzymes.
Polydactyly is expressed when an individual has extra fingers and/or toes. Assume that a man with six fingers on each hand and six toes on each foot marries a woman with a normal number of digits. Having extra digits is caused by a dominant allele. The
couple has a son with normal hands and feet, but the couple's second child has extra digits. What is the probability that their next child will have polydactyly? A) 1/32 B) 1/2 C) 3/4 D) 1/8 E) 7/16
A positive motility result will appear as a ______ stab line.
Fill in the blank(s) with the appropriate word(s).