Why is chloroplast always found on the edge of a plant cell

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.

Crossing over and independent assortment are important activities that occur during meiosis. what is the significance of these activities

Which set of terms best describes a community of miners who live out in the countryside of west virginia and use specialized geographical equipment to analyze the composition of rocks