Two trophic levels
Typically there are three or four trophic levels in a community because after this point, it becomes very hard to sustain organisms. The amount of energy lost at each trophic level makes it harder and harder to sustain life.
From the options given above, the correct option is D. A haploid cell is a cell that contains a single set of chromosomes only. A haploid cell can only undergo asexual reproduction. Asexual reproduction involves only one parent and the cell division usually occurs by mitosis. An organism that is reproducing asexually will transmit 50% of its gene to its offspring[s]. Thus, haploid cells reproduce asexually through mitosis only.
<span>Air pollution is only caused by human activity. False.</span>
The correct answer is option C
The reaction of cellular respiration and burning of fossil fuel needs carbon. Fossil fuel are like coal is made up of carbon. Organic compounds are made up of carbon(abundant), hydrogen and oxygen in small amounts.
The cellular respiration is the process by which the body obtains energy in the form of ATP by the breakdown of carbohydrates which is also a carbon compound.
