Which of the following structures serves as the cells boundary from its a) mitochondrion b) cell membrane c)chloroplast d) channel proteins

Which of the following is a possible reason for sleep? a) growth b)digestive c)speed d)intelligence

Consider the last statement in the prompt: "people take such environmental factors into account in their choices when deciding where to live." do all people have a choice as to where they live? what factor plays a key role in this decision and may therefore play a large role in determining quality of life?

How does a gymnosperm prevent itself from pollinating the same tree