What cause(s) the synchronization of mass spawning events in many invertebrates?

a. the Sun
b. the climate
c. cryptochromes
d. the stars


Answer: c. cryptochromes

Biology & Microbiology

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A danger in using E. coli in cloning is that

A. E. coli could cause disease. B. the human cells may reject the insertion. C. the exons may invert the introns. D. the outer membrane is toxic to humans.

Biology & Microbiology

Amino acids are linked together by ____ bonds

a. phosphodiester b. disulfide c. glycosidic d. hydrogen e. peptide

Biology & Microbiology

It is believed that war vessels in World War II carried the brown tree snake to the island of _. This invasive predator caused extinction of many local populations of birds and small reptiles.

A. Ceylon B. Madagascar C. Guam D. Cuba E. Puerto Rico

Biology & Microbiology

All of the following are true regarding transgenic animals EXCEPT

A. the process has created mice that have a phenotype similar to that of a person with cystic fibrosis. B. foreign genes are micro-injected into eggs, fertilized in vitro, and the zygotes are placed in host females to develop. C. the product desired by the transgenic procedure may be secreted in the milk of female offspring. D. the process has been used to develop organisms that are partially animal and partially plant.

Biology & Microbiology