How does an increase in atmospheric greenhouse gases increase global temperatures?
A) By preventing some of the heat from escaping the planet's surface
B) By decreasing the ozone layer in the atmosphere
C) By increasing the amount of heat from the sun that reaches the planet's surface
D) By reacting with each other
A
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The movement of water across a membrane from an area of high to low water concentration is an
example of ____.
a. active transport b. endocytosis c. osmosis d. both osmosis and active transport e. both diffusion and osmosis
During a 5-mile run in the high Alps, where oxygen concentration is lower, your body will produce less ATP per molecule of glucose than after the same run near sea level, where there is plenty of oxygen to supply your muscle cells
Approximately how many more molecules of ATP will your muscle cells produce per molecule of glucose at the lower elevation than at the oxygen-scarce high elevation? A) 36 B) 34 C) 32 D) 2
An insectivorous bird has the choice of eating (1 ) meadow beetles, which are abundant and large but expose the bird to hawk predation, (2 ) under-a-rock beetles, which are large and fatty but hard to obtain, or (3 ) under-a-leaf beetles, which are easy
to obtain but small. The bird has nestlings to feed. As an optimal forager, it will A) concentrate on under-a-leaf beetles because they are easy and safe. B) concentrate on under-a-rock beetles because they are energy-rich. C) eat one kind of beetle at a time (first under-a-leaf, then meadow, then under-a-rock), switching to a new kind when the old kind becomes scarce. D) eat all three kinds of beetles, balancing the energy spent and the risks incurred against the energy gained.
Inside the cell are ___ where protein synthesis occurs.
What will be an ideal response?