Which statement best describes a cell membrane?

(1) It is found only in animal cells.

(2) It is a nonliving structure.

(3) It controls reproduction in a cell.

(4) It controls the passage of materials into

the cell.

1. DNA ... a. encodes the information needed for making proteins within the cell b. directs RNA to make lipids c. directs RNA to produce glucose d. produces carbohydrates 2. The physical structure of the genetic code is DNA's sequence of ... a.

during the solar eclips, explain why we should observe this event on the water surface in a basin of water

The range of electromagnetic energy emitted by the sun, known as the solar spectrum, is found mostly in three regions of the electromagnetic spectrum. Which type of electromagnetic energy is NOT part of the solar spectrum?

According to the principal of dominance, if a recessive gene for tallness is paired with another recessive gene for tallness, the organism will be tall may be tall or short will be short

Why does sexual reproduction increase the genetic variation in a species? A. Sexual reproduction doubles the chromosome number. B. Sexual reproduction produces organisms with no DNA. C.

Smooth muscle is found in just one place in the body. true or false

Which of the following characteristics evolved independently in mammals and birds? A) bilateral symmetry B) amniotic eggs C) jaws D) bone E) endotherm

A client is heard saying, "i like eggs, fried by meg, served on a keg, kicked in the leg and don't want her to hoopanize them ever again." what should the nurse note in the client's record?

Explain how unfavorable traits can disappear in a specie

Myoglobin, and iron - and oxygen-binding protein found in the muscle tissue of vertebrates, is 0.316% fe by mass. if a myoglobin molecule contains one iron atom, what is the molar mass of myoglobin?