Pure Aluminum foil distilled water Na Cl (table salt) Gold Bar (pure Au) All of these may be classified as A) elements. B) compounds. C) pure substances. D) organic compound.

Channel protein and enzyme that makes ATP

The moon exerts a greater influence then the sun because it is closer. True or false

How might it benefit an organism to have the nucleus near the centre of its cells?

What is the function for carbohydrates

What is a nonexample of a prokaryotic cell

Ape species began to dwindle during the Miocene, leaving only a few remaining: a situation that exists up to the present. It is thought that the number of ape species reduced at that time because

Jon is in a car accident and severs an artery in his leg. He loses a significant amount of blood and experiences a drop in blood pressure. Explain how his body senses these changes, and how it will respond in an attempt to maintain homeostasis.

a scientist is conducting an investigation that involves water, silver corbon dioxide, and oxygen gas. Which group of statement best describes all of the materials he is using in the investigation?

The question below refers to the selection "taste-the final frontier." hydroponic plants are grown - a. on mars. b. without air. c. in water. d. in soil.

The movement of hot and cold air between land and sea creates what? a. Sea breeze b. Solar energy c. Trade winds d. Coriolis effect