Answer:
1. Energy.
2. Pellagra.
3. Niacin.
4. Beta carotene.
5. Osteoporosis.
6. Calcium.
7. Epithelial.
8. Intrinsic.
9. Sunlight.
Explanation:
1. Riboflavin and thiamin are important for energy production within cells, including nervous system cells.
2. Pellagra: the niacin-deficiency disease causing dermatitis.
3. Niacin: this vitamin can be produced in the body if enough tryptophan (an amino acid in proteins) is present.
4. Beta carotene: is one of the plant-based forms of vitamin A that must be made active in the body.
5. Osteoporosis: Thinning of bones that occurs in older age and results in serious fractures.
6. Active vitamin D acts on 3 key target organs/tissues in the body to raise the blood calcium levels.
7. Epithelial: Type of tissue that lines and protects the digestive tract and respiratory tract and is maintained by vitamin A.
8. Intrinsic factor, produced in the stomach, is needed for the body to be able to absorb adequate amounts of vitamin B12.
9. Vitamin D can be produced by exposure of the skin to sunlight.
Answer:
C.) crystalline solids
Explanation:
The solid materials may be crystalline or amorphous. The concept of crystal structure is related to the organization of atoms in a geometrical form. Crystalline structures are present in various materials, where atoms distributed within their structure form a network called the crystalline lattice. Therefore, crystalline structures have salts, metals and most minerals. Crystalline structures are formed by unit cells that are their basic unit, as they constitute the smallest set of associated atoms found in a crystalline structure.
The molecules of the crystalline structures can have two types of bonds, the directional ones, which include the covalent and dipole dipole and the non-directional ones where the metallic, ionic, van der Walls bonds. When formed by ionic compounds, these crystalline structures can result in crystalline solids.
<span>it is...................................diatoms</span>
Dilute/ weak solution as water is moving into the cell to an area of higher solute concentration
B. Convergent Boundaries
If two tectonic plates collide, they form a convergent plate boundary.