Which of the following is not a physical method of microbial control?
a. filtration
b. radiation
c. hot or cold temps
d. antibiotics
Answer: d. antibiotics
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Maternal-effect genes:
A. are expressed by the mother. B. affect maternal phenotype. C. affect offspring phenotype. D. are expressed by the mother and affect maternal phenotype. E. are expressed by the mother and affect offspring phenotype.
Which of the following BEST describes the process of nitrification?
a. N2 ? NH4 + b. NH4 + ? N2 c. N2 ? NO3 ? d. NO3 ? ? N2 e. NH4 + ? NO3
A sexually reproducing animal that can fertilize itselfis known asa ____ hermaphrodite
a. simultaneous b. sequential c. parthogenic d. gastrulated e. preferential
What drives the movement of carbon dioxide from tissue into the bloodstream?
A. active transport against a concentration gradient B. facilitated diffusion down a concentration gradient C. simple diffusion down a concentration gradient D. facilitated diffusion against a concentration gradient E. the heart pumping the carbon dioxide into the bloodstream