Which of the following is/are a free-living amoeba that can cause encephalitis?
A) Acanthamoeba
B) Naegleria
C) Entamoeba
D) Naegleria and Acanthamoeba
E) Entamoeba and Naegleria
D
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Genetic sequence data from mitochondrial and Y chromosome DNA agree that the human family is _____ and it arose _____
A. young; in Africa B. young; in Europe C. old; in Africa D. old; in Europe E. old; in many regions around the world
C3 plants are more susceptible to photorespiration than either C4 or CAM plants, so why do most
plants lack the C4 pathway?
a. Rubisco is more efficient in C3 plants when compared to rubisco C4 and CAM plants. b. Photorespiration is not a serious problem for most plants. c. Most plant species do not have vacuoles in their cells to store the malate generated from CO2 taken in during the night. d. There is an energetic cost to C4 and CAM pathways that only makes them advantageous in very hot and/or arid environments. e. Switching between C3, C4, and CAM photosynthesis is very difficult for most plants.
The ________ of the microscope holds and allows selection of the objective lenses.
A. condenser B. ocular C. stage D. nosepiece
While touring a farm, the farmer tells you that she uses cytokinin to increase crop productivity. But, from biology class you know that cytokinin alone has no effect on parenchyma cells. What other substance is the farmer most likely using in conjunction with cytokinin?
A. Suberin B. Ethylene C. Abscisic acid D. Strigolactones E. Auxin