Since all land-dwelling animals utilize oxygen for respiration, does that make oxygen a limiting
factor?
What will be an ideal response?
Even though all land-dwelling animals require oxygen, it is not considered a limiting factor since it is
in abundant supply.
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Which of the following statements is true regarding chemical weathering?
A. It plays a major role in the short-term carbon cycle. B. It releases CO2 into the atmosphere. C. It relies on the acid SiO2. D. It contributes to the accumulation of CaCO3 in oceans. E. It relies on bacteria to break down rocks.
The oldest cells in a mature leaf are found
a. at the base of the leaf. b. near the very center of the leaf. c. at the stomata. d. at the leaf tip. e. as files of cells at the widest point of the leaf.
Arthritis is a common result of aging, affecting persons' ability to ________
A) catch their breath after exercise B) move their joints C) heal broken bones D) produce red blood cells
Macronutrients are defined as those elements
A. required in relatively large amounts. B. usually needed, but not always available. C. only taken up through the soil. D. required in certain relative amounts in the plant.