More carbon became present in Earth's soil
Answer:
Explanation:
xylem vessels transport water and nutrient from roots to the other parts of the plant
trachieds are elongated in the xylem of vascular plant that play role in the transport of water and mineral salt
seive tube are the elongated living cells of the phloem in the flowering plant they are the conduits of food (mostly sugar) transport
<span>flowing rivers, can be found in areas away from karst topography as well, so it is the best answer</span>
The right option is; B) are not composed of cells.
The single, MOST important reason why viruses are classified as non-living is that they are not composed of cells. The cell is the basic unit of structure and function in organisms. All living organisms are composed of one or more cells (according to the cell theory) and viruses do not have cells. Therefore, many scientists classify viruses as non-living.
Viruses are non-cellular microscopic infectious organism that are composed of two main parts; nucleic acid (DNA or RNA) and a protein coat that protects the nucleic acid. Viruses require a living cell (host) to reproduce and usually cause disease in the host organism.
