They decrease because the zebra mussel were taking their resources. Leaving them nothing to eat.
Answer:
The answer would be ionized.
Explanation: When protons don't equal electrons, an atom is considered ionized.
Answer:
The sun and the earth?
Explanation:
I'm pretty sure that's right, since earth orbits the sun.
The praying of one animal on others.
<h3><u>Answer;</u></h3>
A. Gas exchanges takes place by diffusion.
B. It is an open system.
<h3><u>Explanation</u>;</h3>
- Most molluscs and arthropods have an open type of circulatory system.
- Open circulatory systems pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells.
- Blood is pumped by a heart into the body cavities, where tissues are surrounded by the blood.
