Place 19 white beans in each of the jars. Add 41 red beans to each of the jars. Hold your hand over the opening of one jar and shake the beans. Do the same with the other jar. What do the beans in each jar represent?

During endocytosis, cells expel what they don't need take in what they need shrink due to loss of water

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food

What is a general feature of a species that varies from one individual to the next (skin tone,eye color or hair color)? a.organism b.trait c.character