Answer: B) R group
Explanation: An aminoacid is composed by an amino group, an acid or carbonyl group and a side chain or R group, all bonded to a central carbon atom. Aminoacids are different between them for the R group and can be classified as: 1) Non-polar Neutral if the side chain is uncharged and non-polar (aliphatic or cyclic). 2) Polar Neutral if the side chain contains amida, sulfur or hydroxyl groups. 3) Basic if the side chain contains other amino groups. 4) Acid if the side chain contains other carboxyl groups.
Answer: Photoelectron spectroscopy is the energy measurements of photoelectrons emitted from solids, gases, or liquids by the photoelectric effect. Depending on the source of ionization energy, it can be divided accordingly into Ultraviolet Photoelectron Spectroscopy and X-ray Photoelectron Spectroscopy.
Explanation:
It is one of the most powerful mood-altering chemicals. It was discovered in 1938 and is made from lysergic acid, which is found in ergot, a fungus that grows on rye and other grains.
<u>Answer:</u>
<em>A feedback mechanism for maintaining homeostasis.</em>
<u>Explanation:</u>
In science term, Homeostasis is defined as a mechanism by virtue of which animal or plant cells will try to maintain the equilibrium state in the internal environment using<em> feedback mechanism</em> within the system.
It is also very important to maintain a <em>good communication</em> between the internal organs to maintain the internal environment. A proper functioning body whose needs are met is generally observed in the <em>process of homeostasis.</em>
Since we wish to test the null hypothesis that gender and personal goal are independent. Under the said null hypothesis, the expected number of boys that would select "be good at sports" would be the same more or less with the girls that would select "be good at sports". The difference in their means would be set to zero for this null hypothesis.
