Why do plants use gravity?

Gravity perception is important to plants because they need to send their roots downwards towards water and nutrients and their shoots upwards towards light. Plants are known to detect gravity using statelets, which are small starch-filled packets that settle at the bottom of gravity-sensing cells

Explanation:

Hope this helps.

typically, most spiders possess eight eyes. however, others have as many as 12, and some don't have any. these eyes are for detecting light from dark, deciphering shapes and for gathering their prey.

the answer to your question is sperm