Answer:
A
Explanation:
since living things are made up of cells,it is not difficult to study and draw conclusion..... This has reduced much stress on scientists
There is variation within the population, due to a mutation. The selection pressure is the drug. The microbes that have the advantageous gene which makes them resistant to the drug are selected for, and reproduce passing on the gene, increasing its allele frequency within the population over time. However, the microbes that do not have the advantageous gene, cannot survive and their number decreases within the popullation.
<span>There are three basic chemical components of DNA - 1. Four "Nucleic acids", 2. Deoxyribose sugar, and 3. Phosphate backbone. The overall shape of the molecule is a double-stranded, double helix. It looks a bit like a spiral staircase wrapped around a spiral staircase. Phosphate groups outside, nucleic acids inside the helix,</span>
Pythons have jaws that are connected by flexible ligaments so they can stretch around large prey and then swallow it.
A beef animal born October 10, 2012, considering that we are in 2017, is cattle. Veal calves are less than three months old, calves are less than one year old and cattle are those beef animals that are one year old or older.
Beef carcasses can also be classified into categories according to their maturity. A is equivalent to 9-30 months, B is 30-42 months, C is 42-72 months, D is 72-96 months, and E is >96 months.
