Ques:Q: Which type of substance is considered a proton donor in a reaction? Choices: - base - carbon - oxygen - acid A:

Ans:acid
-----
Ques:Q: What are the two hormones primarily responsible for maintaining homeostasis of blood glucose levels? Choices: - dopamine and melanin - anabolic and metabolic - insulin and estrogen - insulin and glucagon A:

Ans:insulin and glucagon
-----
Ques:Q: What is the name of the magnetic material found in lava? Choices: - meteorite - hemoglobin - magnemite - magnetite A:

Ans:magnetite
-----
Ques:Q: What makes a complete orbit around the earth once every 29 1/2 days? Choices: - Mars - the Sun - Gemini - the moon A:

Ans:
the moon
-----