<u>Answer</u>: Option4 The genes in each type of cell are being expressed differently
<u>Explanation</u>:
Both skin cells and muscle cells are somatic cells i.e the cells that make up the body parts.
Since, both of them are somatic cells they both contain the <em>same number of chromosomes</em> which in case of humans is 23 pairs.
The set of genes present in each type of cell in the body is the same and therefore, both muscle cell and skin cells have the same genes.
The reason why muscle cells and skin cells do not look and act the same is that even though these cells contain the <em>same genes</em>, there is <em>differential expression of genes</em> in these cells.
Differential expression of genes basically means that different combination of genes are activated in a cell which plays a role of defining the purpose of the cell.
This means that the set of genes that are activated in the skin cells are different from that of the muscle cells.
As the <em>genes are being expressed differently</em> in the muscle and skin cells, both these cells acquire different characteristics and thus, look different and perform different functions.
So out of all the options, option 4 is the correct one.
The stem of the plant should be cut at least three to four inches above the surface level. The glass capillary should be tightly fixed with the stem. The initial water level and the final water level should be carefully noted. The droplets on the leaves should be observed and conclude that these drops are not from transpiration.
