There have been 5 Mass Extinctions throughout Earth's history.
That affirmation is correct.
Further information:
It is estimated that about 3/4 of all species where extinct.
This event gave way to the Cenozoic era, which is the one we live in today.
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Answer:
The part of plants that contains structures needed to absorb sunlight and carbon dioxide is the chlorophyll.
Explanation:
Photosynthesis is the process by which plants produce glucose.
The process of photosynthesis requires light energy which plants get from trapping the sunlight. The area of the plant which contains structures to absorb sunlight and for photosynthesis is the chlorophyll. Chlorophyll contains a green coloured substance termed chloroplast. Chloroplast is the site where photosynthesis takes place. Chloroplast is also the structure which is responsible for giving green colour to the leaves.
The toxic condition characterized by retention of
nitrogenous substances in the blood is called uremia. Uremia is a toxic condition caused by
retention in the blood of nitrogenous waste products normally excreted in the
urine. Acute renal failure denotes a
sudden onset of renal failure, such as that caused by an accident, certain
drugs or poison. The kidneys may recover or the damage may be permanent. If the
kidneys stop functioning this condition is what they called uremia, therefore
the body is full of extra water and
waste products, leading to swelling in the hands or feet, fatigue and weakness.
End-stage renal disease refers to when the kidneys have lost all or nearly all
function.
