Вопрос № 190703 - Английский язык

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Blood consists of many elements, liquid and solid. These include red and white blood cells, blood platelets, and blood plasma. The plasma is the liquid part of the blood, something over 90% water. In it are dissolved essential elements that have to be carried from one place to another. These include, for example, organic constituents, such as blood sugar (glucose) and urea; inorganic elements, such as sodium and calcium; gases, such as oxygen and carbon dioxide; and secretions from the endocrine glands (hormones), antibodies, enzymes, and plasma proteins.
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Blood is called the ‘life giver’. Often people die without blood transfusion. More and more blood is needed these days. It takes 5 litres of blood for heart or kidney operations.
A special Blood Service operates in Moscow. Thousands of people give their blood free of charge. Donating blood is popular with students, especially in medical schools and medical institutes. Large Moscow factories have Donor Days.

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In contrast with animals, green plants require for their growth only _____, water, mineral salts and sunlight.

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Each protein molecule consists of a long _____ of amino acids residues.

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All animals require _____ material to their diet in addition to water and minerals.

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Natural _____ results in the production of offspring by one generation that are able to survive and reproduce themselves to form further generation.