The living part of phloem tissue is

Explanation

The question is asking about the living part of phloem tissue. Phloem tissue is responsible for the transportation of organic nutrients, such as sugars, from the leaves to the rest of the plant. The options provided are sieve plate, companion cell, sieve element, and cytoplasm. The correct answer is option B, companion cell. The phloem tissue is made up of two main types of cells, sieve elements and companion cells. The sieve elements are responsible for transporting the nutrients, while the companion cells support the sieve elements by providing them with energy and other necessary materials. The sieve plates, option A, are actually non-living structures found in the sieve elements that help facilitate the movement of nutrients. The sieve elements, option C, are also involved in nutrient transportation, but they are not the living part of the phloem tissue. The cytoplasm, option D, is a component found in all living cells, but it is not specific to phloem tissue. Understanding the different parts of phloem tissue is important for comprehending how plants transport nutrients throughout their body. To learn more about this, please read the relevant sections of the recommended textbooks.