The human T-lymphotropic virus 1 causes
A) hairy cell leukemia.
B) adult acute T-cell lymphocytic leukemia.
C) Hodgkin's lymphoma.
D) hepatic cancer.
E) Burkitt's lymphoma.
B
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Several new materials have been developed for use in the microbiology lab. These materials must be sterilized before use, but cannot withstand a temperature over 60oC and can't be exposed to water. Which method of sterilization would be applicable?
A. Oven-dry heat B. UV radiation C. Steam autoclave D. Ionizing radiation
In a monocot seed, what is the fate of the coleoptile?
a. it becomes the stem b. it becomes the root c. it stops growing d. it becomes the cotyledon e. it becomes the hypocotyl
Dibenzoylhydrazines are a category of molecules that have been used as insecticides. They work by blocking ecdysteroid receptors. How does this kill an insect?
A. The insect can no longer excrete nitrogenous wastes. B. The insect cannot molt. C. The chitinous exoskeleton is dissolved. D. The insect can no longer coordinate its movements.
Your biology professor takes the class on a field trip to a local lake. You spend an hour studying the lake and writing down all observations. You hypothesize that the lake is oligotrophic. Which observations would support this hypothesis? (Check all that apply.)A) The shoreline is mostly rock and sand with very little vegetative matter.B) The lake has extensive aquatic plant beds.C) The lake has little planktonic growth.D) The bottom of the lake is easily visible.E) An oxygen probe reveals low oxygen content in the water.
What will be an ideal response?