The answer is A
Cells are the simplest unit and systems are made up of organs that are made from tissues that are made from cells.
Answer:
<u>Homeostasis</u>
Explanation:
This is the ability of an organism to maintain constant conditions in the internal to the external environments. The most important conditions of the internal environment that must be kept constant include: osmotic pressure of blood, blood sugar, temperature and metabolic wastes.
Homeostasis can be maintained in the body through sweating to regulate temperature, lowering of hair, vasodilation of superficial blood vessel and animals living in very cold habitats have a particularly thick layer of subcutaneous fat which prevents heat loss
Answer:
Petroleum, also called crude oil, is a fossil fuel. Like coal and natural gas, petroleum was formed from the remains of ancient marine organisms, such as plants, algae, and bacteria. ... Millions of years ago, algae and plants lived in shallow seas
