The Human Immunodeficiency virus can be transmitted via breast milk

a. true
b. false


Answer: a. true

Biology & Microbiology

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Which of the following statements concerning cancer and mutations is correct?

A. Cancer can only occur with a mutation in a somatic cell. B. Cancer can only occur with a mutation in a germ cell. C. Usually multiple mutations are required in different genes to cause cancer. D. Usually a single mutation is all that is required to cause cancer. E. None of the answer options is correct.

Biology & Microbiology

Factors that affect the final amount of stored energy in an ecosystem include all of the following

EXCEPT a. the size of the producers. b. the availability of mineral nutrients. c. how much sunlight and rainfall are available during a growing season. d. the temperature range. e. the type of decomposers.

Biology & Microbiology

The human population on Earth is expected to reach 9.7 billion people by

A) 2015. B) 2050. C) 2093. D) 3150.

Biology & Microbiology

Parental care of the young is usually associated with species with a type ________ survivorship curve.

A. I B. II C. III D. I or II (depending on the sex ratio) E. I or III (depending on whether the reproductive strategy is iteroparous or semelparous)

Biology & Microbiology