Which way does time run on this tree?
A) from the branch tips to the root (top to bottom)
B) from the root to the branch tips (bottom to top)
C) across branch tips, from right to left
D) across branch tips, from left to right

How many variables are altered in a good experiment? a.1 b.0 c.2 d.3

Which of the following shows the correct order in which light information travels through the eye? (2 points) lens, pupil, retina, optic nerve pupil, lens, retina, optic nerve pupil, lens, optic nerve, retina lens, pupil, optic nerve, retina

Which of the following is not a potential result of deforestation?