Compounds are made up of two or more elements which are chemically bonded. The elements and the properties of the compound are different. Exposure to light and chemical reaction can break compounds into elements. Compounds are only chemically separated not physically. The mass of elements determined the mass of the compound.
Answer:
C. B cells produce antibodies specific to the flu virus.
Explanation:
I'm pretty certain that the earth's circumference is greatest at the equator.
Answer:
Weight and skin color.
You can be born with a different skin color and it can change according to the place you live in. Suppose you were born in Alaska and moved to Mexico, your skin color would become darker as you will receive more vitamin D. You body structure to will also be based on your parents. If your parents are fat but you exercise and eat healthy your body structure will change.
Answer:
A. Controls what goes into and out of the cell
Explanation:
If what you are referring to is the image attached, then the answer would be A. The structure that is labelled A is called the cell membrane.
The cell membrane is what we call semi-permeable. This means that some materials can go through them and others cannot without the help of other factors. The cell membrane encases the cell and protects the cell. It lets nutrients, minerals, and waste to move in and out of the cell.
Other choices:
B describes the cytoplasm.
C describes the nucleus
D describes the vacuole
