embryonic stem cells could serve as a model to evaluate the physiological effects of environmental pollutants efficiently and cost-effectively.
UVB radiation increases? This damages the eyes, skin and immune system! Sorry! I just guessed because there were no choices that went along with the question!
There is only one structure feasible for a tetrahedral molecule with such a formula, under the supposition that A is in the center of the tetrahedredon. In this case X and Y are in the vertices of the tetrahedron.
If you draw several figures changing the position of the X's and the Y around the center (A), you will see that all are equivalent.
This is the case of the product CH3Cl, named chloromethane, which, for the same reason given above, does not have isomers.
Answer:
The revision likely helped producers in the United States, because they no longer had to comply with the expensive regulation.
Explanation:
Answer:
Buffer
Explanation:
Buffers may be defined as the solution of a weak acid with ithe conjugate base or a weak base with the conjugate acid. Buffers are not affected by the the additions of strong acid or base in a solution.
Whenever a strong base or acid is added to the buffer, it may release or binds with the hydrogen ion and maintains the pH of a body fluid. Blood has a buffer of carbonate ions and bicarbonic acids that maintains the blood pH.
Thus, the correct answer is option (E).
