it dates back to the Precambrian era
Answer:Capillaries
Explanation: Capillaries are tiny, thin walled vessels that form a network to take blood through the organs and other body tissues. The dense networks of capillaries present a large surface area, which allows materials to be exchanged between body cells and the blood rapidly.
Answer:
Photosynthesis.
Explanation:
Photosynthesis is the process by which photosynthetic organisms such as plants and algae turn inorganic carbon compounds (usually carbon dioxide) into organic carbon compounds (usually carbohydrate sugars such as glucose). It causes carbon to move from one reservoir to another; examples are photosynthesis, respiration and combustion.
A solar eclipse occurs<span> when the moon gets between Earth and the sun, and the moon casts a shadow over Earth. </span>A solar eclipse<span> can only take place at the phase of new moon, when the moon passes directly between the sun and Earth and its shadows fall upon Earth's surface.</span>