Q: Q: On insects, what are the openings on the sides of the abdomen that allows respiration to occur? Read this paragraph and choose the correct option from the provided answers: Respiration that occurs without lungs. Insects have a system of internal tubes and sacs that oxygen travels through to reach body tissues. Air is taken in through the spiracles , openings on the sides of the abdomen. Choices: - gills - wings - chloroplasts - spiracles A:
A: spiracles

Q: Q: What term describes weathering that occurs as water expands when it freezes, wedging apart rock? Read this paragraph and choose the correct option from the provided answers: form of mechanical weathering that occurs as water expands when it freezes, wedging apart rock. Choices: - chemical weathering - cleavage - erosion - mechanical weathering A:
A: mechanical weathering

Q: Q: What are the two components of a mixture called? Read this paragraph and choose the correct option from the provided answers: Combinations of different substances are called mixtures. Choices: - nutrients and a solvent - acid and base - concentration and a solvent - solute and a solvent A:
A: solute and a solvent

Q: Q: What is a group of organs that work together to do the same job? Read this paragraph and choose the correct option from the provided answers: Organs may be organized into organ systems. An organ system is a group of organs that work together to do the same job. For example, the heart is part of the cardiovascular system. This system also includes blood vessels and blood. The job of the cardiovascular system is to transport substances in blood to and from cells throughout the body. Choices: - an organ colony - an organ assembly - an organ battery - an organ system A:
A: an organ system