How do you think global warming is affecting leaf abscission?
A. Leaf abscission is happening later in the fall.
B. Leaf abscission is happening earlier in the fall.
C. No change.
D. Leaf abscission occurs continually.
Answer: A
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Indicate whether the statement is true or false.
During which stage of mitosis does the nuclear envelope begin to reappear?
a. Telophase b. Anaphase c. Metaphase d. Interphase
Both eyes have an optic disk. When an image is focused on the optic disk, it cannot be "seen."
Indicate whether the statement is true or false
Atmospheric levels of carbon dioxide have rapidly increased since the industrial revolution. One effect of increased atmospheric CO2 is global warming. What effect does increased CO2 have on plants?
A. some crops such as tomatoes and cucumbers may experienced enhanced growth rates B. C4 photosynthesis may become more important than C3 photosynthesis C. plants may be able to absorb carbon dioxide even with their stomata closed D. plants may no longer need light for photosynthesis