Answer:
dopamine
Explanation:When you take a substance your releseses dopamine and over time you need more stimulant to keep your brain satisfied hope this helps god bless
Isotopes are variants of a particular chemical element which differ in neutron number, although all isotopes of a given element have the same number of protons in each atom. The term isotope is formed from the Greek roots isos and topos, meaning "the same place"; thus, the meaning behind the name is that different isotopes of a single element occupy the same position on the periodic table.
The percentage range of an adult's kilocalorie that is recommended as the maximum to be from fat is between 20-35% of kcal from fat. Fats and oils are part of a healthful diet, however the type of fat makes a difference to heart health and the total amount of fat consumed is important. Fat contains about 9 kilocalorie per gram. Fats are classified as saturated, monosaturated, or polysaturated based on the type of chemical bonds in their fatty acids. The recommended fat intake is between 20 to 30 percent of calories for adults, 30 to 35 percent of calories for children 2 to 3 years and 25 to 35 percent for adolescents 4 to 18 years of age.
Answer: A gene that is hidden or not expressed.
Answer:
b
Explanation:
It is a fossil of sea shells