An enzyme is active in the stomach of an animal but quickly loses its activity when it leaves the stomach. This example illustrates that enzymes are
A) specific to the organs in which they are produced.
B) inactivated by movement.
C) sensitive to changes in pH.
D) inactivated by inhibitors in the small intestine.
E) consumed by the quantities of substrate in the small intestine.
C) sensitive to changes in pH.
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In Figure 17.5a, none of the F2 females has white eyes. Why?
A. F2 females have two X chromosomes, and in this cross all F2 females are homozygous for the red-eye allele. B. F2 females have two X chromosomes, and in this cross they all have one X carrying a red-eye allele and another X carrying a whiteeye allele. C. Females can never have white eyes because this allele is recessive. D. The allele for red eyes is dominant over white eyes, and these F2 females are either homozygous dominant (red-eye allele) or are heterozygous. E. Females always have red eyes because this allele is dominant.
A normal distribution curve contains all the possible experimental outcomes in graph form. The tall central segment of the curve represents the outcomes with the highest probability of occurrence
The average outcome, represented by the center of the data distribution, is known as what?
In areas that have a stable population, the number of children born in a period of time is
A) decreasing. B) lower than the number of adults. C) higher than the number of adults. D) increasing. E) approximately equal to the number of adults.
A homozygous recessive genotype would be represented by _______.
a) bb B) It depends on the gene. c) Bb d) BB