Q: What is the radula made mostly of? Read this paragraph and choose the correct option from the provided answers: Many species have a feeding structure, the radula , found only in mollusks. The radula can be thought of as a "tongue-like" structure. The radula is made mostly of chitin. Types of radulae range from structures used to scrape algae off of rocks to the beaks of squid and octopuses. Choices: - casein - chlorophyll - schist - chitin A:
chitin

Q: An inclined plane is a good example of what kind of machine? Read this paragraph and choose the correct option from the provided answers: An inclined plane is also a simple machine. The resistance is the weight of the box resting on the inclined plane. In order to lift this box straight up, the effort force would need to be equal to its weight. However, assuming no friction, less effort (a smaller effort force) is required to slide the box up the incline. We know this intuitively; when movng boxes into a truck or onto a platform, we use angled platforms instead of lifting it straight up. Choices: - strong - complex - weak - simple A:
simple

Q: What is the first step of the calvin cycle called? Read this paragraph and choose the correct option from the provided answers: The Calvin cycle has three major steps: carbon fixation, reduction, and regeneration. All three steps take place in the stroma of a chloroplast. Choices: - dioxide fixation - carbon maturation - breath fixation - carbon fixation A:
carbon fixation

Q: In contrast to mammals and birds, freshwater fishes produce large volumes of very dilute what? Read this paragraph and choose the correct option from the provided answers: Choices: - nitrogen - feces - blood - urine A:
urine