Tiny sacs in the lungs where oxygen exchange takes place. fundamental working unit of the nervous system. sometimes called the master gland.

Describe the three steps of the lock and key model of enzyme function.

A population that is small, but more than "endangered" is considered to be A) extinct B) alarmed C) threatened D) scarred

what is thermometric property ... ?

Mammals possess a unique class structure and allows the mother nurture the child as it develops in the womb. It exists in skunks? Explain

Which of the following is cohesive behavior an important, life-sustaining property of water? expansion upon freezing ability to moderate temperature contraction upon freezing versatility as a solvent

In which part of body is not found sebaceous glands?

Which of the following accurately describes the angiosperm plant life cycle? A. The ovule develops into an anther. B. The anther produces eggs. C. The embryo develops into a seedling. D. The ovary is haploid.

Which resource is a nonrenewable resource? fresh water maple trees solar energy precious metal

The trace or remains of an organism that lived ago, most commonly preserved in sedimentary rock?

Usually flowers contain more stamens than pistil. Why?