What is the average size of a human brain?

What is the process of a new plant growing from its seed into a seedling? primary growth fertilization pollination germination

Which is a function performed by stem cells in the skin a. replacing lost skin cells b. making cells for the intestines c. growing new organs d. differentiating into brain cells plz apex

Which worm has eyespots that are used to detect light? a fluke b marine worm c planarian d tapeworm