Ques: Q: What is a pure substance that cannot be separated into any other substances called? Read this paragraph and choose the correct option from the provided answers: An element is a pure substance that cannot be separated into any other substances. There are 92 naturally occurring elements. Choices: - light - Cells - Spears - element A:
Ans: element

Ques: Q: What is the position of rock layers and the relative ages called? Read this paragraph and choose the correct option from the provided answers: Superposition refers to the position of rock layers and their relative ages. Relative age means age in comparison with other rocks, either younger or older. The relative ages of rocks are important for understanding Earth's history. New rock layers are always deposited on top of existing rock layers. Therefore, deeper layers must be older than layers closer to the surface. This is the law of superposition . You can see an example in Figure below . Choices: - diffraction - metamorphism - bifurcation - superposition A:
Ans: superposition

Ques: Q: What is the major intracellular cation? Read this paragraph and choose the correct option from the provided answers: Potassium Potassium is the major intracellular cation. It helps establish the resting membrane potential in neurons and muscle fibers after membrane depolarization and action potentials. In contrast to sodium, potassium has very little effect on osmotic. Choices: - magnesium - sodium - glucose - potassium A:
Ans: potassium

Ques: Q: Plant-like protists are called what? Read this paragraph and choose the correct option from the provided answers: Plant-like protists are called algae. They include single-celled diatoms and multicellular seaweed. Like plants, they contain chlorophyll and make food by photosynthesis. Types of algae include red and green algae, euglenids, and dinoflagellates. Choices: - bacterium - sponge - yeasts - algae A:
Ans:
algae