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08.01.2022 18:30

Английский язык

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Найдите 5 глаголов в тексте и напишите три формы глаголов. Plants are highly important sources of food for man and farm animals. They also supply people with clothing, shelter and many other things aswell. To obtain high yields of farm crops it is necessary to study the principal parts of the plant and their functions. The principal parts of a plant are the root system and the above ground portion1 consisting of stems, leaves, flowers and seeds.The root performs two main functions. It absorbs plant nutrients as well as water from the soil and anchors the plant. There are two types of roots: fibrous roots and tap roots. All grain crops have fibrous roots, while tap roots are typical of legumes and root crops. Alfalfa and sugar beets are examples of crops having tap roots.As to stems and leaves they are usually above the ground. To support leaves and to conduct water and nutrients from the roots to the leaves are the main functions of the stem. The food used by green plants is produced in the leaves through the process known as photosynthesis. A flower is the part of the plant where seeds are produced. Thus, to produce seeds the plant must have flowers. All parts of a plant must be developed well in order to function properly, If conditions for plant growth are not favourable the plant will beweak to develop its parts well.