Q: What plant hormone allows plants to curve in a specific direction? Read this paragraph and choose the correct option from the provided answers: Plants may not be able to move to another location, but they are able to change how they grow in response to their environment. Growth toward or away from a stimulus is known as a tropism ( Table below ). Auxins, a class of plant hormones, allow plants to curve in specific directions as they grow. The auxin moves to one side of the stem, where it starts a chain of events that cause rapid cell growth on just that one side of the stem. With one side of the stem growing faster than the other, the plant begins to bend. Choices: - peptides - pheremone - apoptosis - auxin A:
auxin

Q: A voltage source and a conductor are common to all what? Read this paragraph and choose the correct option from the provided answers: All electric circuits have at least two parts: a voltage source and a conductor. They may have other parts as well, such as light bulbs and switches, as in the simple circuit seen in the Figure below . To see an animation of a circuit like this one, go to: http://www. rkm. com. au/animations/animation-electrical-circuit. html. Choices: - magnets - thermometers - cooling circuits - electric circuits A:
electric circuits

Q: What forms when the metal sodium gives up an electron to the nonmetal chlorine? Read this paragraph and choose the correct option from the provided answers: An ionic bond forms when the metal sodium gives up an electron to the nonmetal chlorine. Choices: - covalent bond - van der waals force - hydrogen bond - an ionic bond A:
an ionic bond

Q: A hypothesis is scientific only if it can be tested by what? Read this paragraph and choose the correct option from the provided answers: For a hypothesis to be testable means that it is possible to make observations that agree or disagree with it. If a hypothesis cannot be tested by making observations, it is not scientific. Consider this statement:. Choices: - independent variable - making a conclusion - carbon dating - making observations A:
making observations