If i have a tree in my back yard, and in the middle of the summer, the leaves start turning and falling, does that mean the tree is dying?

Why does the skin of your finger shrink when you wash clothes for a long time?

Which member of the following food chain will be least affected by ddt, a pesticide water pollutant, if bio-magnification is occurring? algae> zooplankton> crayfish> leopard frog> large mouth bass

How do the sperm cells get from the stigma to the ovules? a. they slide down the petals to the bottom of the flower. b. they travel through pollen tubes. c. they travel along filaments. d. insects carry the sperm cells from the stigma to the ovules.