Each cell becomes a thin plate; these plates pile into layers to form the nail. As with hair, nails form by keratinization. When the nail cells accumulate, the nail pushes forward. The skin below the nail is the matrix.
Hair is made of a tough protein called keratin. A hair follicle anchors each hair into the skin. In the hair bulb, living cells divide and grow to build the hair shaft. Blood vessels nourish the cells in the hair bulb, and deliver hormones that modify hair growth and structure at different times of life
Nails start in the nail root, hidden under the cuticle. When cells at the root of the nail grow, the new nail cells push out the old nail cells. These old cells flatten and harden, thanks to keratin, a protein made by these cells. The newly formed nail then slides along the nail bed, the flat surface under your nails.
The answer is B human capital
that they will change over time and adapt to new envirments
During meiosis, two successive nuclear divisions happens namely Meiosis I or reduction and Meiosis II or division. In meiosis I, it separate chromosomes after allowing crossing over. In meiosis II, it the then separates each chromosomes by splitting them. This division produces 4 haploid cells.
Answer:
C. Respiration.
Explanation:
To respirate means to breath and breathing takes oxygen out of the atmousphere. And it was the only one that made sence.
