Question

Что такое почка. как происходит рост побега в длину

Answer 1

в длину Побег растет за счет деления клеток в конусе нарастания верхушечной почки .там находятся клетки образовательной ткани и (верхушечные меристемы ).у злаковых растений еще дополнительно наблюдается вставочный рост за счет деления клеток вставочные меристемы находящие у основания междоузлий побегов

Answer 2

What is a kidney?

The kidney is an essential organ in the human body that plays a crucial role in maintaining overall health. It is a pair of bean-shaped organs located on either side of the spine, just below the rib cage. The kidneys are responsible for filtering waste products, excess water, and toxins from the blood, producing urine, regulating electrolyte balance, and maintaining blood pressure. They also play a role in the production of certain hormones, such as erythropoietin, which stimulates the production of red blood cells.

How does a shoot grow in length?

The growth of a shoot in length is a complex process that involves the activity of meristems, specialized regions of actively dividing cells in plants. The primary meristem responsible for shoot growth in length is called the apical meristem, which is located at the tip of the shoot.

The apical meristem contains undifferentiated cells that continuously divide and produce new cells. These new cells differentiate into various types of tissues, such as vascular tissue for transport, ground tissue for support, and epidermal tissue for protection. As the cells are produced at the apical meristem, they push the older cells below them, causing the shoot to grow in length.

The growth of a shoot in length is regulated by various factors, including hormones such as auxins. Auxins are plant hormones that promote cell elongation and are produced in the apical meristem. They help regulate cell division and expansion, allowing the shoot to grow longer. The distribution of auxins within the shoot also plays a role in determining the direction of growth, allowing the shoot to respond to environmental cues such as light and gravity.

In addition to cell division and elongation, shoot growth in length also involves the development and differentiation of specialized structures, such as leaves, branches, and flowers. These structures contribute to the overall growth and development of the shoot.

Overall, the growth of a shoot in length is a dynamic and coordinated process that involves the activity of meristems, the production and differentiation of new cells, and the regulation of hormones such as auxins.