The answer is c because the precession of the ecliptic was component of a milankovitch cycle and is related to periodic ice ages through out history
Answer:
the answer is d
Explanation:
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Water or other molecules move down their concentration gradient without any energy.........
difference - simple diffusion uses help of transporting protein in the membrane whereas osmosis uses no help.
The folds in the stomach lining are called rugae. On these rugae, you will find a thin line of mucous which helps protect the stomach lining. The innermost layer is called Simple Columnar Epithelium.
<span>An atom that has gained or lost electrons is called an ion</span>