Cell-surface receptors are involved in most of the signaling in multicellular organisms. There are three general categories of cell-surface receptors: ion channel-linked receptors, G-protein-linked receptors, and enzyme-linked receptors.
Answer:

Explanation:
=> In the first graph, we come to know that winters are colder and summers are hotter.
=> In the second graph, winters have more precipitation than summer.
=> On the whole, Winters have lower temperature and more precipitation than summers. ← [Option 2]
=> Summers have high temperatures and less precipitation.
Removes the nucleus from an egg cell and replaces it with the nucleus from another organism
Answer:
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<span>Cells repair themselves through the process of cell division and mitotic process. <span>Mitosis
occurs more in your body since it changes, modifies and requires cell
division at maximum rate in many useful situations with the stand to a
particular system and organ. Mitosis and meiosis are simply cell
division processes that occurs differently, they're characteristically
divergent from each other according to their function and structure.<span>
Organelles
are tiny parts of a cell, in analogy are like organs. They perform
various tasks vital for a cell to survive. They deliver information,
send nutrients and excrete waste and protect cells from antibodies and
other microorganisms that could and possible harm the cell itself.<span> </span></span></span></span>