Explain the three measures of retrieval and forgetting that Herman Ebbinghaus studied using nonsense syllables.

A substance that gives up an electron to a free radical is a

Gordon adds a piece of solid zinc metal to a beaker of hydrochloric acid. He identifies the products as zinc chloride and hydrogen gas. Which process took place in the beaker? A. evaporation B. condensation C. a physical change D. a chemical change

Which model shows more diversity? A. Food chain B. Food web

What initially causes a nerve impulse

Which of the following is a simple form of carbohydrate? A. glycogen B. starch C. glucose D. carbon

Which source of energy is normally used for short bursts of activity? lipids protein glycogen lactic acid

Why does wind develop?

A hormone travels through the circulatory system to deliver a signal. Of what is this an example? A. enzyme B. intracellular C. ion channel D. intercellular

A monk crossbred? plants, which can have purple or white? flowers, and obtained 754754 plants with white flowers and 290290 plants with purple flowers. find the empirical probability that a plant had each type of flower

What gametes might each plant produce? Purple flowered