When Went placed the agar block on one side of the decapitated shoot, the shoot curved away from the agar as it grew. This demonstrated that some kind of hormonal signal had diffused into the agar from the coleoptile tips. ... Went's experiment represented the first time that anyone had isolated a hormone from plants.
Answer:
so that whenever we get hurt or something happens our system can grow back like a scar.Everyday it is rebuilding new cells as well as it is always throwing away cells that don't work anymore
Frogs and pigeons both lay eggs. They may both share this characteristic because eggs are an easy way to allow young to develop outside of the womb.
Just to add on over time they have develiped a tuff outer layer to stop weather and insects from harming them.
Human activities such as fishing and game often cause an impact on the ecosystem
human waste enters other natural ecosystems where it can cause them to be unbalanced