Most climate models predict that during the 21st century mean global temperature will increase by:
A. 2–5°C
B. 1–3°C
C. 5–7°C
D. 7–10°C
E. 12–15°C
A
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Earth's early atmosphere contained (select all that apply):
A. methane. B. water. C. nitrogen. D. hydrogen. E. organic molecules.
The term evolution is used to describe
A. heritable changes in characteristics of a population from one generation to the next. B. any change in an individual that can be observed. C. changes in the number of individuals in a population due to mating. D. the ability of an individual organism to pass on what it has learned, through experience, to the next generation. E. any change in an individual organism that occurs in somatic cells.
The _____________includes bones of the limbs or fins, which are connected to the body's main axis by the pectoral and pelvic girdles.
A. axial skeleton B. appendicular skeleton C. endoskeleton D. hydrostatic skeleton E. exoskeleton
What is the major lipid found in membranes?
A. cholesterol B. phospholipids C. steroids D. saturated fatty acids E. triglycerides