A certain atom has an atomic number of four. how many protons does it have?

a. 0b. 4c. 8d. 2

The renin-angiotensin system activates to restore fluid to a normal level when a person is dehydrated.

Which type of rna makes up the ribosomes that manufacture polypeptides

The tilt of the Earth on its axis causes places near the A. poles to receive more direct sunlight B. equator to receive more direct sunlight C. poles to have a warm climate D. equator to have a cold climate

The nurse is caring for a patient with pleurisy. what symptoms does the nurse recognize are significant for this patient's diagnosis?

Which of the following is a true statement about cellular respiration? Group of answer choices Cellular respiration occurs only in plant cells. Cellular respiration occurs only in animal cells.

Explain why clear-cutting is a more destructive method of wood harvesting than selective cutting.

Which process changes sedimentary rocks into igneous

Unlike minerals such as iron and calcium, protein is a macronutrient in the human diet. Why is protein a macronutrient?

Energy drinks have become increasingly popular. Somebody's trying to contain large amounts of caffeine which is known to increase heart rate in most individuals. This effect on the heart rate can be Dangerous because it can lead to

Which statement describes an activity of a decomposer? A) a mushroom digests and absorbs nutrients from organic matter?