Down syndrome is a third chromosome in the 21st pair.
Explanation: Compound: A substance that is made up of more than one type of atom bonded together. Mixture: A combination of two or more elements or compounds which have not reacted to bond together; each part in the mixture retains its own properties.
Plants
1: The plant cell was the first cell discovered.
2: Plants cell wall can hold more fluid.
3: The plant cell is static and protected.
Animal
1: The nucleus can be located anywhere in the cell.
2: Animal cells have small vacuoles
3: Animal cells can terminate themselves.
Answer:
A molecule is an electrically neutral group of two or more atoms held together by chemical bonds. Molecules are distinguished from ions by their lack of electrical charge.
