Answer:
there is no relationship between thi observation and the size of testes.
Plants get nitrogen from the soil but it has to be turned into nitrates (by lighting or nitrogen fixation); this because nitrogen in the air is very unreactive, Then the animal eats the plant.
Bacteria can get nitrogen simply from the air
Una célula eucariótica/ eucariota es una célula u organismo con un núcleo claramente definido y tiene una membrana nuclear que la rodea.
Pulmonary is relating to the lungs.
Systemic circulation is the part of the cardiovascular system which carries oxygenated blood away from the heart to the body, and returns deoxygenated blood back to the hear
Hope that helps:)
<span>Your answer is Precambrian.</span>
