(Q).
Q: When current flows in just one direction, what is it called? Read this paragraph and choose the correct option from the provided answers: When current flows in just one direction, it is called direct current (DC) . The current that flows through a battery-powered flashlight is direct current. Choices: - mono-current - reactant current - alternating current - direct current A:
(A).
direct current

(Q).
Q: What do organisms need to speed up biochemical reactions? Read this paragraph and choose the correct option from the provided answers: Enzymes are needed to speed up biochemical reactions in organisms. They work by lowering activation energy. Choices: - genes - carbohydrates - hormones - enzymes A:
(A).
enzymes

(Q).
Q: Dinosaurs filled the niches that mammals fill today during which era? Read this paragraph and choose the correct option from the provided answers: In the Mesozoic, dinosaurs filled the niches that mammals fill today. Choices: - Cenozoic - Phanerozoic - Proterozoic - mesozoic A:
(A).
mesozoic