Ques: Q: While matter is recycled, ecosystems need a constant input of what? Choices: - heating - food - light - energy A:
Ans: energy

Ques: Q: What is the amount of moisture in the atmosphere? Choices: - static - mixture - heat - humidity A:
Ans: humidity

Ques: Q: Mating with no strong pair-bonds is called? Choices: - mutual - covalent - heterogeneous - promiscuous A:
Ans: promiscuous

Ques: Q: The pituitary gland is called the "master gland" of what system? Choices: - hormonal - digestive - nervous - endocrine A:
Ans:
endocrine