NEET BIOLOGY

Detailed explanation-1: -The mechanism by which sugars are transported through the phloem, from sources to sinks, is called pressure flow. At the sources (usually the leaves), sugar molecules are moved into the sieve elements (phloem cells) through active transport.

Detailed explanation-2: -The plant’s vascular tissues-xylem and phloem-transport water to the leaves and carry glucose away from the leaves.

Detailed explanation-3: -The phloem is composed of three types of cells – the conducting cells, the parenchyma cells and the supportive cells. The conducting cells, also called sieve elements, are composed of columns of sieve tube cells that have perforations in their lateral walls and that helps in the conduction of food throughout the plant.

Detailed explanation-4: -Phloem is the vascular tissue in charge of transport and distribution of the organic nutrients. The phloem is also a pathway to signaling molecules and has a structural function in the plant body. It is typically composed of three cell types: sieve elements, parenchyma, and sclerenchyma.

Detailed explanation-5: -The glucose that is made in photosynthesis needs to be transported to other parts of the plant where it’s needed-this happens in the phloem vessels in a process called translocation.