Answer:
I believe the answer is D for the top one
Answer:
Ionic compounds
Explanation:
Ionic crystals are hard and brittle and have high melting points.
Answer:
Hormones are molecules produced by the endocrine system that send messages to various parts of the body. They help regulate your body's processes, like hunger, blood pressure, and sexual desire. While hormones are essential to reproduction, they are fundamental to all the systems of your body.
The largest natural population of organisms that can interbreed to produce fertile offspring are species.
