The best answer is D.
In active transport, molecules move against a concentration gradient from areas of lower concentration to areas of higher concentration. This happens a lot in neurons. The membrane proteins are constantly pumping ions in and out to get the membrane of the neuron ready to transmit electrical impulses.
In active transport , energy is required to move molecules across the cell membrane. Carrier proteins are needed for this e.g. proteins of the GLUT family which transport glucose molecules across the cell membrane. Carrier proteins are very specific. GLUT proteins will only move glucose molecules and not sodium or calcium. There are hundreds of types of carrier proteins.
Answer:
2,8,8
Explanation:
the first shell only contains 2 and the other shells contain 8
Answer:
D. Zimbabwe
Explanation:
Dahil hindi siya nabibilang sa kanlurang Africa
Answer:
Soil can become waterlogged. The water can cut off the air supply to the roots and to the organisms that live in the soil. If the roots do not receive enough oxygen, the plants will die because they rely on oxygen to complete photosynthesis.
Explanation:
<span>(1) Does the pH of water affect the growth of radish plants?
</span><span>(2) pH of the water
</span><span>(1) repeating the experiment several times</span>
