Which of the following is not a sterilization method?
A.
Hot air oven
B.
Autoclave
C.
Pasteurization
D.
Filtration
C
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The same bees that pollinate the flowers of the Brazil nut trees also pollinate orchids, which are epiphytes (in other words, plants that grow on other plants); however, orchids cannot grow on Brazil nut trees. These observations explain _____
A) the coevolution of Brazil nut trees and orchids B) why Brazil nut trees do not set fruit in monoculture plantations C) why male orchid bees do not pollinate Brazil nut tree flowers D) why male orchid bees are smaller than female orchid bees
Oncologists (medical doctors who treat cancer patients) routinely take biopsies (samples) of tissue from patients to determine whether the tissue is cancerous or not. What would be the best technique to use to determine whether cells from the tissue
sample are cancerous? A) Count the number of chromosomes in the cells from the tissue sample and compare to the number of chromosomes in noncancerous cells from the patient. B) Add cells from the tissue sample to a cell culture dish and compare their growth against a sample of noncancerous cells from the patient. C) Measure the amount of DNA in G1 in the cells from the tissue sample and compare it to the amount of DNA in G2 in noncancerous cells from the patient. D) Add cells from the tissue sample to a rat to see whether the rat develops cancer or not.
A form of diffusion in which the molecules pass through a protein instead of between the phospholipids is called ________
A) diffusion B) facilitated diffusion C) active transport D) osmosis
Broad-spectrum drugs that disrupt the body's normal flora often cause
A. nephrotoxicity. B. superinfections. C. drug toxicity. D. allergic reactions. E. All of these choices are correct.