Ques: Q: What shape is the lens of the eye? Choices: - spherical - angular - concave - convex A:
Ans: convex

Ques: Q: An inclined plane is a good example of what kind of machine? Choices: - strong - complex - weak - simple A:
Ans: simple

Ques: Q: Ecosystem dynamics include more than the flow of energy and recycling of matter. ecosystems are also dynamic because they? Choices: - stay the same - recreate exactly alike - never move - change through time A:
Ans: change through time

Ques: Q: Vertebrates are all chordates that have a what? Choices: - circulatory system - fossil - brain - backbone A:
Ans:
backbone