Answer:
Option-2
Explanation:
Endosymbiosis theory explains the origin of the eukaryotic organism from the prokaryotes by observing the mitochondria and Chloroplast as evidence.
The endosymbiosis theory proposed that a protoeukaryote engulfed the autotrophic bacteria which evolved into the chloroplast and a chemotroph which evolved into the mitochondria.
These events could have taken when the autotrophic bacteria started using carbon dioxide and produced oxygen in the atmosphere that is around 541 million years ago.
When the concentration of the oxygen increased then the mitochondria would have used this toxic gas to produce energy and the chloroplast also formed a symbiotic relationship at that time.
Thus, Option-2 is correct.
The component of exercise that primarily strengthens the heart is aerobics. This heart strengthening exercises may include biking, running, walking, swimming, aerobic dances and a lot more that are sure to add strength to your your heart, lungs and stamina.
Explanation:
B. Assay using antibodies to detect small drugs in solution
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Answer:
This happens because of our immune system. Our immune system keep record of every attacking microbe. It contains two type of while blood cells firstly is T cell that respond quickly to the attacking microbe. While secondly B cells that recognize those specific cells and fights them off. In addition to that B cells clones itself as memory cells for that disease and will remains in your body for years
The advantageous proteins that build larger molecules help prolong life life. If there is better survival and reproduction, it is more likely to pass onto the next generation. If it continues to be advantageous, the sequence of them change to support the life of the current species.