It was believed that a asteroid hit the Earth (specifically Mexico) when the asteroid hit it caused a freezing darkness due to dust and debris being kicked up by the asteroid . The dust and debris blocked the sunlight causing a temperature drop.
Answer:
A cell wall is a structural layer surrounding
of plant cells, just outside the cell membrane. It can be tough, flexible, and sometimes rigid. It provides the cell with both structural support and protection, and also acts as a filtering mechanism
The head of a phospholipid is "water loving" and is said to be hydrophilic.
Answer: An endangered species is where a species of animals has a low population therefore making it endangered
If someone is aware of their actions on the environment that gives them the opportunity or the ability to change what their actions are there for bettering the environment