Mitochondria most likely evolved by
a photosynthetic cyanobacterium
cytoskeletal elements
endosymbiosis
membrane proliferation

endosymbiosis

Explanation:

The scientist believe that mitochondria used to be a free bacteria in the medium. How the mitochondria sinthesize so much ATP and the animal cells use ATP as a source of energy, they merged themselves so the animal cell has a source of energy and the mitochondria has a refuge.

The correct answer is - true.

Explanation:

Like macromolecules and vitamins, minerals are also essential for a healthy body. The essential minerals can be divided on the basis of their requirement into major minerals and trace minerals.

The trace elements and the major elements both are equally important. It does not matter if a high amount of major elements are required and a small amount of trace elements required. The amount is not an indication of the importance of the element.