Answer:
Cell membrane
Explanation:
Cell membrane is an important part in cell which performs various vital functions. It is not only a simple boundary that surrounds the protoplast rather it is a semi permeable membrane structurally made of proteins and lipid bilayer and regulates the transport of different materials across it.
It regulates the following transports -
- Disposal of wastes
- Export and import of nutrients
- Export and import of various ions
- Export and import of gases
About 97.5% of the earth's water is saltwater and about 2.5% is fresh.
Answer:
Human activity can affect the amount of carbon in the atmosphere. When fossil fuels like oil, coal, and natural gas are burned, carbon dioxide is released into the atmosphere as waste.
Explanation: