Answer:
It cannot be digested and, therefore, provides little nutritional value
Explanation:
To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.
The variation may already exist within the population, but often the variation comes from a mutation, or a random change in an organism's genes.
Answer:
Diffusion is the movement of water across a selectively permeable membrane.
Explanation:
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Answer:
Elements are made up of only one type of atom.
Each element has a unique chemical symbol.
Elements can be identified by their atomic number.
