Nutrition is the interaction between an organism and its ________
Fill in the blank(s) with correct word
food
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________ is to xylem as ________ is to phloem
A) Sclerenchyma cell; collenchyma cell B) Apical meristem; vascular cambium C) Vessel element; sieve-tube member D) Cortex; pith E) Vascular cambium; cork cambium
14. The "spent" electrons from electron transport in aerobic cellular respiration are transferred to
A. hydrogen, to neutralize its charge before passing through ATP synthase. B. sulfur, oxidizing it to form more hydrogens in the concentration gradient. C. carbon dioxide, in order to allow it to enter the Krebs cycle. D. oxygen, thereby reducing it to form water. E. nitrogen, reducing it to form NADH.
In the carbon cycle, ______ from the atmosphere is used in photosynthesis to synthesize carbon-containing organic molecules in a process called ______.
A. carbon dioxide; combustion B. carbon dioxide; carbon fixation C. hydrocarbons; oxidation D. hydrocarbons; cellular respiration
What were the major disadvantages of our early ancestors becoming bipedal?
A. Decrease in speed and mobility. B. Lower back problems developed. C. Increased predation by faster predators. D. Decreased protection of the abdominal region.