Sulfur dioxide released by coal-burning power plants contributes to _____
a. ozone destruction
b. sea level rise
c. acid rain
d. desertification
C
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Meerkats are small desert mammals that live in groups of 20–50 animals. You observe a female meerkat who spends all of her time caring for the 1-year-old offspring of her sister (her nieces and nephews)
The aunt is capable of reproduction but has not reproduced. Which of the following would contribute to the evolution of this behavior pattern? A. The odds of any one female reproducing are completely random. B. Offspring require the efforts of a single adult (the mother) in order to be successful. C. Offspring require the efforts of at least two adults in order to be successful. D. Offspring are independent at the age of three months, with no adult care after that point.
In the diagram of a root tip shown above, the item labeled "1" is the
a. quiescent center. b. zone of cell division. c. zone of elongation. d. root cap. e. zone of maturation.
A change in a population that is related strictly to its size is best described as ____
a. density-dependent b. density-independent c. biotic d. logistic e. exponential
Agromegaly is caused by hypersecretion of ________ hormone in adults.
Fill in the blank(s) with the appropriate word(s).