Question

Help pleeaaaseee!!

Answer 1

In his experiments with grass seedlings, Darwin covered the tips of some seedlings with transparent sheaths to see if..

OPTIONS:

Plant naturally grew toward a source of light.

auxins were produced in the tips of stems.

the presence of a sheath affected plant growth.

OR

auxins could be produced in the absence of light.

Answer 2

i think number 3
-the presence of a sheath affected plant growth

Answer 3

Thanks!