C membrane with the help of a channel protein
Answer:
c
Explanation:
Natrual selection is survival of the fittest, so only the best suited for that environment survive.
These first trees had a huge importance for the other plants and for the animals, and this was because:
- they managed to change the structure of the atmosphere by consuming, using, and storing carbon dioxide, and releasing oxygen, which made the atmosphere much more suitable for life.
- they managed to influence the climate, by making it more moist, and also making the ground bellow them cooler.
- they were producing large amounts of biomass, which made the soil types much richer in nutrients, which in turn enabled more and more plants to grow.
- they were a food source of the animals.
Answer:
divergent plate boundaries
Explanation:
Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense.