Answer:
C. muscle cell, muscle tissue, stomach.
hope that helps
Explanation:
Radiometric dating reveals the exact (i think its exact) age of a fossil.
Answer:
1. Autotrophs
2. The Sun
3. Consuming Other Organisms
Answer:

Explanation:
An element only has <u>one</u> type of atom and cannot be broken down by chemical means.
Let's analyze the answer choices.
1. This has two types of atoms, so it cannot be an element. It has more than one type of atom.
2. This has two types of atoms that are bonded together. It cannot be an element because there is more than one type of atom and the bonds can be broken.
3. This has one type of atoms, so it is an element.
Therefore the best answer choice is 3.