Changes at the molecular level can turn proto-oncogenes into oncogenes. These changes cause unregulated cell division. Which disease is caused by this transformation?
A. diabetes
B. leukemia
C. pneumonia
D. hemophilia
Ans: B. leukemia
Biology & Microbiology
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Vascular cambium (wood) evolved independently in several different groups of vascular plants
A. true B. false
Biology & Microbiology
The generally accepted explanation for the
movement of organic compounds in phloem is a. the cohesion-tension theory. b. the pressure flow theory. c. active transport. d. the transpiration-pull theory. e. root pressure.
Biology & Microbiology
The letter “A” in the above figure is
a. the epidermis. b. the sweat gland. c. the dermis. d. the hypodermis. e. none of the above.
Biology & Microbiology
Which positive regulatory protein is required for the production of phage coat protein in lambda?
A) CI B) Cro C) N D) Q E) None of these
Biology & Microbiology