Uracil is readily produced by the chemical degradation of cytosine so have thymine as the normal base makes detection and repair of appearing mutations more efficient
Answer:
chitin
Explanation:
this function determines the cell shape and metabolism
<span>Biodiversity describes the variability among living organisms and it is very important because it boosts ecosystem productivity. In the ecosystem each species, no matter how small has an important role to play. The four major components of biodiversity are:
1. Ecological diversity
2. Genetic diversity
3. Organismic diversity
4. Cultural diversity</span>
The diffusion of water into or out of a cell is called osmosis.
Answer: C
Explanation:
Viruses don't have cell walls that can be attacked by antibiotics; instead they are surrounded by a protective protein coat. Unlike bacteria, which attack your body's cells from the outside, viruses actually move into, live in and make copies of themselves in your body's cells