Answer:
Animals give off carbon dioxide and plants make oxygen by carbon dioxide.
Answer:
Through the study of meteorites, their chemical composition of silicates—material made of silicon and oxygen. Others contain metal—nickel and iron. Knowing what the meteorite was composed of lets you know where it came from. Chondrites are composed of hardened lava - this is occurred at the beginning of the solar system (4.5 mya). Carbonaceous chondrites contain carbon and water which formed away from the sun.
Explanation:
Answer:
Astrocytes
Explanation:
Astrocytes are the most abundant cells in the central nervous system that twine around nerve cells supporting the brain and spinal cord. They perform many functions; such as providing the nuerons with nutrients, control the blood brain barrrier and blood flow. Astrocytes are basically responsible for maintaining the central nervous system homeostasis.
Answer;
College monitor.
Explanation.
Maintaining professional standards is a function of the college monitor role.
College monitor roles include supervising and monitoring students within and outside the school building, enforcing appropriate student behavior, communicating with students regarding issues and/or behavior, escorting students and/or unauthorized visitors
