What is one difference between DNA and RNA?

A) Only DNA contains the base adenine.

B) Only RNA contains the base guanine.

C) Only RNA contains the sugar fructose.

D) Only DNA contains the sugar deoxyribose.

Which of these are families of elements? A. metals and noble gases B. shells and nonmetals C. properties and rare earth elements D. metalloids and atoms

Non-nutritive, high bulk substances what types of food are individuals with bulimia nervosa most likely to consume during an episode of binge eating

How do intracellular communication and intercellular communication differ? A: Intercellular communication involves passing an electrical charge through plasmodesmata. B: Intracellular communication involves passing molecules through gap junctions.

What is an allele? A. Trait form that is hidden by a dominant gene B. One of different forms of the same gene C. Trait form that is displayed by recessive genes D. Identical copies of two different genes

What is the smallest unit of a element that retains the property of that element

After a hypothesis has been repeatedly tested and becomes widely accepted, it is considered a

The root of the tooth is held by the periodontal ligament a. True b. Falsee

At the center of the Andromeda galaxy is a source of x rays that scientist believe is a black hole with how many more times than the sun

True or false? The more similar two organisms are, the more distant their common ancestor is.

The blood-brain barrier a. is fully developed in humans when they are born. b. prevents many drugs from entering the brain. c. is designed to allow all drug compounds into the brain. d. cannot be penetrated, even with trauma to the brain.