Answer:
Some viruses are hard to treat because sometimes it’s not the virus that makes us sick; it’s our immune system.
Explanation:
The answer is epithelium. In particular, stratified squamous epithelium. Epithelium is protective tissue that is found on<span> the outer surfaces of </span>organs and blood vessels<span> and </span><span>inner surfaces of </span>cavities<span> in many internal organs. Epithelium contains no blood vessels, and nutrients reach the epithelial cells through diffusion from the underlying tissue.</span>
Chromatin, the DNA is unraveled in the nucleus, but during mitosis, the DNA will condense into chromosomes(two sister chromatids).
Despite a homologous chromosome pair having the same gene position the genes may contain different alleles
They are called sacromeres.
