Biology Help

1. which of the following is necessary for plants to exhibit phototropism?
A. gravity
B. touch
C. auxin
D. dormancy

2. Tree that growing around a lamp post is an example?
A. geotropism.
B. thigmotropism
C. phototropism
D.photoperiodism

3. As the night get longer and temperature become cooler, some plants?
A. enter a state of dormancy, or inactivity.
B. enter a state where their cells divide and the plant reproduces.
C. enter a state where they begin to sprout leaves.
D. enter a state where the plant responds to touch.

4. A vine growing around a lamp post is an example of?
A.geotropism.
B. thigmotropism
C. phototropism
D.photoperiodism