What are Sieve elements

Answer 1

Sieve elements are specialized plant cells that are responsible for the transport of organic substances, such as sugars, throughout the plant. They are part of a tissue called phloem, which is involved in the process of conducting food materials (photosynthates) from the site of synthesis (leaves) to the sites of storage or utilization in various parts of the plant. Sieve elements are connected end-to-end to form sieve tubes, which provide a pathway for the flow of sugars and other organic compounds from source to sink. These cells have unique features, including sieve plates with pores that allow the passage of materials, and lack a nucleus and many other organelles to facilitate efficient transport.