<span>The proteins that are embedded in the cell membrane act as channels to transport substances in and out of the cell.</span>
Answer:
The seafloor is only 180 million years old due to the process of subduction. The floor of the sea's tends to get colder and denser with the passage of time. At a certain time, the seafloor becomes so dense that it sinks in the upper mantle. The Earth's crust cannot undergo this process and hence has oldest rocks. We can say that the seafloor is less than 180 million years old because it is typically recycled back into the mantle of the Earth.
Because some problems are not always small enough for one nation that can do it by themselves and need more helpo
Fossil Fuels are one form of pollution. It can affect the balance by making Carbon more dominant than Oxygen. If the fossil fuels continue to increase. Oxygen will decrease and we will all die because of no oxygen to breathe in.
