Mimosa plants spread their leaflets during the day and fold them at night. You decide to design an experiment to test whether Mimosa's leaf movements are controlled by a biological clock. Which experiment would be the best test of your hypothesis?
A) Growing the plant indoors and turning the lights on in the middle of the night. If a biological clock is controlling leaf movement, the leaves will open.
B) Putting the plant under a bright light in the middle of the day. If the leaves close, a biological clock mechanism is ruled out.
C) Subjecting the plant to a flash of red light in the middle of the night. If the leaves open at the usual time the next morning, a biological clock mechanism is ruled out.
D) Putting the plant in a dark closet at nightfall. Check on the plant at noon the next day, while the plant is still in the closet. If the leaves are open, a biological clock is indicated.
Answer: D
You might also like to view...
When fishery effort increases and catch remains stable or decreases
a. fishers need to find alternative methods to catch fish. b. fishers simply need to relocate to another patch. c. the abundance of the fish is declining. d. costs remain high. e. the size of fish caught tends to increase.
Explain why flowers that attract flies are well-adapted to their pollinator? What will be an ideal response?
Two closely related insect species are active at different times of day, with one diurnal and the other nocturnal. This is an example of spatial isolation
Indicate whether the statement is true or false
A decrease in pressure within an arteriole will initiate a(n)
A) myogenic response. B) cardiac and venous baroreceptor reflex. C) arterial baroreceptor reflex. D) active hyperemia. E) sinus arrhythmia