BOTANY

BOTANY

PLANT ANATOMY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What are the two types of cells involve i transportation trough phloem?
A
Sieve cells and Sieve tubs-members
B
guard cells and sieve cells
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Both albuminous cells and companion cells function to load and unload sugars into the cavity of the sieve cells or sieve tube members.

Detailed explanation-2: -There are two types of phloem: Primary Phloem and Secondary Phloem.

Detailed explanation-3: -Companion cells provide sieve tube members with proteins necessary for signaling and ATP in order to help them transfer molecules between different parts of the plant. It is the companion cells that helps transport carbohydrates from outside the cells into the sieve tube elements.

Detailed explanation-4: -Sieve tubes, found in angiosperms, are living cells that are associated with companion cells. The association with companion cells helps in distant transportation within the plant cells. The sieve tubes are made up of longitudinal arrangement of sieve tube members from end to end.

Detailed explanation-5: -The structural elements of phloem include sieve tubes, companion cells, phloem parenchyma and secretory cells. The sieve tube is the conducting element of the phloem. It is formed from a vertical series of elongated cells, interconnected by perforations in their walls in areas known as sieve plates.

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