A. send signals toward the central nervous system
Answer:
Explanation:Toxic materials e.g synthetics
They become even more toxic as they are converted to more toxic products by reaction with other substances or by metabolism of microorganism
The most likely answer is B, increased significantly. This is so, because of the vast amount of cars, and factories, still in use.So, based upon the statistics and the levels of pollution all over the world, I would have to answer B.
Answer:
Option (d).
Explanation:
Active transport is used for the transportation of the molecules through the plasma membrane. The active transport requires energy in the form of ATP from molecules transport.
The molecule moves from their region of the higher concentration to the region of their low concentration. The substances involved in the active transport move against their concentration gradient and requires an energy input.
Thus, the correct answer is option (d).
The answer is "<span>c. Ozone in the troposphere is beneficial to living organisms."
because options a, b and d are true about ozone layer.
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Ozone layer is the area of the upper atmosphere, between around 15 and 35 km over Earth's surface, containing generally high groupings of ozone particles (O₃). Roughly 90 percent of the environment's ozone happens in the stratosphere. The ozone layer successfully squares all sun oriented radiation of wavelengths under 290nm from achieving Earth's surface, including certain kinds of UV and different types of radiation that could harm or kill most living things.
