Which structure is a characteristic found only in angiosperms?
A. flower
B. leaf
C. megaphyll
D. seed
E. vascular tissue
Answer: A. flower
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The animal phylum with the most species is
(a) Mollusca. (b) Annelida. (c) Arthropoda. (d) Platyhelminthes.
The most common STD in the United States is
caused by
a. a protozoan. b. a bacterium. c. a fungus. d. a virus. e. unprotected sex.
At which one of the following days in the 28-day cycle is a woman MOST likely to get pregnant?
A) 1 (start of the menses) B) 7 C) 14 D) 21 E) 28
The ability to taste the compound sodium benzoate is controlled by the dominant allele 'B', while individuals homozygous for the recessive allele 'b' are unable to taste this compound. In a population of 1000 individuals, 100 are unable to taste sodium benzoate. Assume that this population is in Hardy-Weinberg equilibrium.
a. 0.250 b. 0.316 c. 0.432 d. 0.949