Which of these hormones enables us to excrete concentrated urine?
A) Renal diluting hormone
B) Homeostatic hormone
C) Diuretic hormone
D) ADH
E) Aldosterone
D
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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.
What is thought to be the origin of mitochondria and chloroplasts?
A. Cyanobacteria for mitochondria, purple bacteria for chloroplasts B. Purple bacteria for mitochondria, fungi for chloroplasts C. Purple bacteria for mitochondria, cyanobacteria for chloroplasts D. Algae for mitochondria, cyanobacteria for chloroplasts
How do the alternative and classical complement systems differ?
a) The classical requires B cell activation b) The classical does not require B cell activation c) The alternative requires B cell activation d) The classical recognizes lipopolysaccharides without an antibody
In Earth's history, what might the cooling of the Earth and the resulting change from a forested to a grassy landscape have made adaptive in humans?
A. social structure B. grasping fingers C. complex language D. bipedalism