All cells are surrounded by a membrane.

Which sentence states a characteristic of a cell membrane?

1) It is rigid.

2) It is semipermeable.

3) It is weak.

4) It is square.

True or false: in order for a trait to evolve by means of natural selection, it must be heritable, that is, it must be passed down from one generation to the next through DNA? True False

Cholesterol is the precursor molecule for all steroids in the body. cholesterol is the precursor molecule for all steroids in the body. a. True b. False

Which part of the female reproductive system is also called the birth canal? a. Cervix b. Fallopian tube c. Uterus d. Vagina

Propranolol hydrochloride (inderal) is a beta-adrenergic blocker often used as an antianginal, antiarrhythmic, and antihypertensive drug. before giving inderal to a patient, what should the nurse assess?

After the dna is replicated, and it condenses in prophase, two identical rods of dna are seen. these are

Drowsiness affects your senses especially your

Which statements explain what the fossil record indicates? Check all that apply.

Compare bacterial DNA to animal nuclear DNA

Have you noticed that all the sugars end in âose this root word means

Redwood trees (Sequoia sempervirens) have more biomass than any other plant species in western redwood forests. They greatly impact the other plant and animal species that live in these forests.