Over tropical rainforest areas, approximately 90% of the water that reaches the atmosphere comes from

A. plant absorption.
B. animal metabolism.
C. plant transpiration.
D. plant metabolism.
E. animal perspiration.


Answer: C

Biology & Microbiology

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Each human ?-globin locus contains two ?-globin genes, ?1 and ?2, and most individuals have two copies of the locus. Which of the genotypes would result in the most severe phenotype? (A"–" represents a deletion allele.)

A) ?1 ?1 / ?2 ?2 B) ?1 – / ?2 – C) ?1 ?1 / – – D) ?1– / ?2 ?2 E) ?1 – / – –

Biology & Microbiology

Which of the following are examples of biotechnology applications for site-specific recombination?

A. replacement of one gene allele for another on the chromosome B. deletion of a gene from the chromosome C. alteration of the linear structure of a chromosome D. insertion of a new gene into a defined location on the chromosome E. All of the choices given are correct.

Biology & Microbiology

Which of the following statements about fats is INCORRECT? 

A. Fats are a good source of energy. B. Fats contain approximately 2 hydrogens per carbon in the molecule. C. Most fats do not dissolve in water. D. Fats contain nitrogen, carbon, hydrogen, and oxygen atoms.

Biology & Microbiology

_______ is responsible for breaking down ozone in the upper atmosphere.

A.

CO2

B.

CH3

C.

CFC

D.

CO4

Biology & Microbiology