Which H+ ion has just passed through the inner mitochondrial membrane by diffusion?
A) hydrogen ion A
B) hydrogen ion B
C) hydrogen ion C
D) hydrogen ion D
E) hydrogen ion E
Answer: E) hydrogen ion E
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Occupying Europe and western Asia from about 150,000 to 28,000 years ago, ____ had a heavier build, more
pronounced brow ridges and slightly larger brains than modern humans, and were culturally and technologically sophisticated.
a. Homo habilis b. Homo erectus c. Australopithecus africanus d. Australopithecus afarensis e. Homo neanderthalensis
Which is an important function of the skeletal system?
A) providing support for the body B) allowing communication between organs C) excreting waste substances D) utilizing energy from food
In green plants, which photosystem absorbs photons to excite electrons in the reaction center?
A. photosystem I B. photosystems I, II and III C. photosystems I and II D. photosystem III E. photosystem II
Fibrous bands that develop as a complication of surgery are called ______.
Fill in the blank(s) with the appropriate word(s).