What does ground tissue produce and store?
sugars
epidermis
lignin

What does all of the organ system in a human form

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of

Which fossil organism in whale evolution do you think was the first to live mostly in water? explain your claim with evidence and reasoning?