A. It forms a part of the upper atmosphere known as the ozone layer.
The correct answer is C.
Cell theory is a theory, not a law because the cell theory does not have enough support to become a law.
Cell theory is referred to as the history of scientific theory. All cells come from pre-existing cells, and that is the basic unit reproduction and a basic unit of all organisms. The three tenets of cell theory are,
1. cells arise from pre-existing cells.
2. The cell an organizational basic unit and structure in organisms.
3. All living organisms are composed of more or one cells. Cell theory did not become a law because the scientist who discovered it, did not give it a credit to become a law but a theory.
Since it did not have enough support to become a law.
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Answer: 3. The half- life of the isotope must be long enough to capture the age of the rock. and
4. their should be more than one unstable isotope.
In radioactive dating proces, the parent isotope is in unstable state which undergoes decay process to give stable daughter isotopes. Half-life is the amount of time it takes for half of the parent isotopes to decay. The rock dating requires a long lived parent isotope so that it can capture the exact rock age.
One rock when get decayed in the daughter isotope other will be available identify the age.
The unconscious id, according to Sigmund Freud, was the part of the mind composed of biological drives and the source of psychic energy.
believe the correct answer from the choices listed above is option A. The two principal ways to describe Earth’s structure are based on the chemical composition and thickness of layers. Since Earth is a layered structure, it is viewed according to its different chemical composition and the thickness.
