Q: How do humans learn behaviors? Read this paragraph and choose the correct option from the provided answers: Humans learn behaviors through conditioning, as well. A young child might learn to put away his toys by being rewarded with a bedtime story. An older child might learn to study for tests in school by being rewarded with better grades. Can you think of behaviors you have learned by being rewarded for them?. Choices: - Aural pressure - Verbal pressure - pressure - conditioning A:
conditioning

Q: What do many scientists think are the oldest eukaryotes? Read this paragraph and choose the correct option from the provided answers: Scientists think that protists are the oldest eukaryotes. If so, they must have evolved from prokaryotic cells. How did this happen? The endosymbiotic theory provides the most widely-accepted explanation. That's because it is well supported by evidence. Choices: - prokaryotes - plants - arthropods - protists A:
protists

Q: What is the basic structure that holds plants upright, allowing plants to get the sunlight and air they need? Read this paragraph and choose the correct option from the provided answers: Stems are organs that hold plants upright. They allow plants to get the sunlight and air they need. Stems also bear leaves, flowers, cones, and smaller stems. These structures grow at points called nodes. The stem between nodes is called an internode. (See Figure below . ). Choices: - twig - stamen - root - stem A:
stem