Some plants are able to endure frequent flooding events because they form
A. adventitious roots that reach above the surface of the water.
B. more xylem.
C. an extra layer of spongy mesophyll.
D. an extra porous epidermal tissue.
Answer: A
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Mismatch repair, base excision repair, and nucleotide excision repair are similar in that (select all that apply):
A. each repairs a single mismatched base. B. each repairs a short strand of mismatched nucleotides. C. each repairs multiple mismatched or damaged bases across a region. D. each uses an undamaged segment of DNA as the template to repair a damaged segment of DNA. E. none of these.
Which of the following breakthroughs in mycology was one of the first examples of biotechnology patenting?
a. The development of a reliable strain of brewer’s yeast b. The discovery of penicillin as an antibiotic c. The isolation of the immunosuppressant drug cyclosporin which reduces the risk of infection after an organ transplant d. The use of Penicillium to create the characteristic blue-veined Roquefort cheese from France
During the day in most plants
a. carbon dioxide accumulates in leaf cells. b. turgor pressure in the guard cells decreases. c. water and potassium move into the guard cells. d. the guard cells wilt. e. water is conserved.
Cosmids are plasmids that can be packaged into capsids of the bacteriophage lambda; therefore, they can be transmitted like phages, but they can exist and replicate in a cell like plasmids.
Answer the following statement true (T) or false (F)