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
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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.
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 – / – –
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.
_______ is responsible for breaking down ozone in the upper atmosphere.
A.
CO2
B.CH3
C.CFC
D.CO4