In all sexually reproducing organisms, the diploid phase of the life cycle begins at

a. spore formation.
b. gamete formation.
c. meiosis.
d. mitosis.
e. fertilization.


Ans: e. fertilization.

Biology & Microbiology

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Which of the following members of the normal microbiota inhibit the growth of Candida albicans?

A. E. coli B. Lactobacillus species C. Staphylococci species D. Propionibacterium species

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Suppose Priestley repeated his experiment using many kinds of plants besides mint, and that when different plants were placed under the jar the candle remained lighted for different periods of time. What would be a logical conclusion from these experiments?

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Master genes that affect development tend to be highly ____; therefore, similarities in patterns of embryonic development reflect shared ancestry that can be evolutionarily ancient.

a. homologous
b. degraded
c. conserved
d. mutated
e. related

Biology & Microbiology