The gases O2 and CO2 enter or leave a plant cell by
A) facilitated diffusion.
B) simple diffusion.
C) active transport.
D) osmosis.
E) facilitated transport.
B
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Which set contains the most closely related terms?
A) megasporangium, megaspore, pollen, ovule B) microsporangium, microspore, egg, ovary C) megasporangium, megaspore, egg, ovule D) microsporangium, microspore, carpel, ovary
The amount of water evaporated from the Earth's surface relative to the amount of water vapor transpired by plants is known as the ____
Fill in the blank with the appropriate word.
Answer the following statements true (T) or false (F)
1. Genetic drift is when an individual from one population is introduced into a new population, introducing new alleles. 2. The presence of the traces of pelvic bones in both whales and snakes indicate that they descended from an ancestor that once had legs. 3. The theory of evolution can accurately explain the origin of life on Earth. 4. Organisms can have forms that look similar but come from very different evolutionary ancestors. 5. The fact that mitochondria cannot live outside of the cell suggests that ancestral cells engulfed and kept alive free-living prokaryotic anaerobes.
Greenhouse gases block
A. carbon dioxide molecules escape from Earth. B. heat escape from Earth. C. oxygen molecules escape from Earth. D. UV wavelengths escape from Earth. E. UV wavelengths from reaching Earth's surface.