If it has valves then it is a vein.
The cell is fundamental unit of structure and function in living organisms .All cells arise from pre-existing cells by division . The cell theory states that the cell is the basic unit of life and that all other cells are developed from an existing cell. This theory was developed way back in the mid of 17th century.
Due to its short life cycle this fly can easily multiply if its population is not controlled. <span>The house fly is known to carry more than 100 diseases including tuberculosis and cholera</span>
Answer:
It’s A
Explanation:
Itw a because it does contain a nucleus
<span>The correct option is C. Erosion is the process by which the earth surface get worn down. It involves the removal of soil, rocks or dissolved material from one location and its transportation to another location. Erosion can be caused by water, wind and glacier.</span>
