Ques: Q: What do a river and all its tributaries make up? Choices: - abundance system - water system - food system - river system A:
Ans: river system

Ques: Q: Which type of glaciers form several unique features through erosion, including cirques, aretes, and horns? Choices: - line glaciers - deep glaciers - icebergs - valley glaciers A:
Ans: valley glaciers

Ques: Q: The populations that live in the same area form this? Choices: - a colony - a habitat - a biome - a community A:
Ans: a community

Ques: Q: Proper kidney function is essential for homeostasis of what level, which in turn helps ensure the functioning of enzymes? Choices: - oxygen - calcium - ions - ph A:
Ans:
ph