Answer:
d. The carbon atoms came from carbon dioxide and were incorporated into sugars through photosynthesis in the grass.
Explanation:
Grass eating cows are heterotrophs and can not synthesize the organic sugars by themselves. They derive it from grasses they eat.
Grasses are the autotrophs that can fix atmospheric carbon dioxide into glucose in the presence of sunlight by the process of photosynthesis. The extra glucose formed during photosynthesis is stored in the cells of grasses in the form of starch and becomes a source of carbon for herbivores such as cows.
The deoxygenated blood leave the right ventricle via pulmonary artery to the and is taken to the both right and left lung. That is the deoxygenated blood is taken to alveolar capillaries of the lung . As blood flows through the alveolar capillaries it is oxygenated as carbon dioxide leaves.
They start as single cell orginisms then they evolve from there.
hope that helps
Answer:
the answer would be the first one which is sexual reproduction
