B, as far as we know humans aren't from space
Answer:
Fatty acids are long chain carboxylic acids, they contain the carboxyl, COOH, functional group. The general formula for a fatty acid is R-COOH where R represents a long hydrocarbon chain. If the hydrocarbon chain, R, contains only single bonds between the carbon atoms, the fatty acid is said to be saturated.
Answer:
A. The number of electrons of a neutral atom always equals the number of protons.
Explanation:
For Example
Sodium (Na)
Atomic Number = 11
number of protons and electrons = 11
The organelle in a cell is most like a stomach
Answer:
fish and tetrapods are both vertebrates that have a backbone with a spinal cord. fish lived before tetrapods because their fossils are in rocks over 500 million years old.
Explanation:
fish and tetrapods are both vertebrates that have a backbone with a spinal cord
