Which of the following is NOT a characteristic of the acquired immune response?
a. memory
b. specificity
c. ability to respond to millions of different antigens
d. ability to distinguish self from nonself
e. adaptive
C
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How do the haploid and diploid phases of the plant life cycle differ from those of the animal life cycle?
a. In plants, the diploid phase dominates the life cycle, while in animals the haploid phase dominates the life cycle. b. In plants, mitosis occurs only during the haploid phase while in animals mitosis occurs only during the diploid phase. c. In plants, mitosis occurs only during the diploid phase, while in animals mitosis occurs only during the haploid phase. d. In plants, mitosis occurs during both the haploid and diploid phases, while in animals mitosis occurs only during the diploid phase. e. In plants, meiosis occurs during the haploid phase, while in animals meiosis occurs during the diploid phase.
Pronounced wet and dry seasons and warm year-round temperatures are characteristic of
A) chaparrals. B) tropical rain forests. C) deserts. D) tundras. E) tropical deciduous forests.
Legionellosis, caused by the bacterial respiratory pathogen Legionella pneumophila, has decreased in recent years due to advances in wastewater treatment procedures
Indicate whether the statement is true or false.
Which of the following statements is correct about the cell cycle?
A. The cell cycle is a sequence of replication and division that produces a new cells. B. The phase of the cell cycle are G1, S, and M phases. C. In actively dividing cells, the S and G2 phases are collectively known as interphase. D. When the S phase of the cell cycle is finished, a cell actually has twice as many chromatids as the number of chromosomes in the G1 phase. E. During G2 phase, the cell grows and copies its chromosomes in preparation for cell division.