I believe its D
Hope this helps!
(also Karen has a serious problem!)
Small molecules are able to pass through a cell membrane because the membrane itself is semipermeable. Larger molecules require the cell expend energy to transport the molecules across the cell membrane, usually by engulfing them.
<span>humans and animals breathe in oxygen and remove carbon dioxide on the other side of the plants breathe in carbon dioxide and release oxygen. The process of making the air in the atmosphere is in equilibrium. Activities of modern humans burn fossil fuel in large quantity that the concentration of CO2 in the air to be very high while production of O2 has not increased</span>
That would be A. Photosynthesis.
Answer:
Magnetic reversals
Explanation:
When the Earth's magnetic field reverses, a new stripe, with the new polarity, begins. Such magnetic patterns led to recognition of the occurrence of sea-floor spreading, and they remain some of the strongest evidence for the theory of plate tectonics.
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