Which type of wave does not require a medium in which to travel?
sound
water
light
mechanical

Use this diagram of an animal cell to answer the question. where does the first stage of cellular respiration occur? w x y z

Despite the differences in mature plant cells, all of them are derived from meristem cells. the three major types of tissue systems develop from the meristem. meristems develop cells in all but which tissue?

Ialready know the answers to these questions and they are on the attachment. but i just need to know why that answer is the correct one. plz asap! this is for a report that i need to email by 10!