Where does the most energetically costly mode of locomotion occur?
A. On land
B. Locomotion in the water and on land are nearly equivalent in terms of energy expenditure.
C. In the water
D. In the air
Answer: A
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The most abundant protein on Earth is:
A. chlorophyll. B. cellulose. C. rubisco. D. water. E. keratin.
Directional pumping of protons during electron transport establishes a(n) ________ across the inner mitochondrial membrane
Fill in the blank with correct word.
The resting potential of a neuron primarily is established by movement of _______ ions out of the cell.
Fill in the blank(s) with the appropriate word(s).
________ are chemical substances produced in small quantities in one part of an organism and then transported to another part of the organism, where they bring about physiological responses.
A. Photosynthates B. Heat shock proteins C. Hormones D. Glycoproteins E. Pulvini