AP BIOLOGY

PLANTS

PLANT TISSUE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Choose the correct necessity of primary growth:clue 2 answers
A
Allows maximum elongation of plants to absorb sunlight for photosynthesis
B
Primary phloem can transport the products of photosynthesis from the leaves to other parts of the plants.
C
Provides stability to plants by increasing the stem and rootdiameters to suit the height of plants
D
Provides mechanical support to plants
Explanation: 

Detailed explanation-1: -While the main role of the phloem tissue is to transport carbohydrates from sources to sinks through the sieve elements, phloem is also composed of parenchyma cells, which play a key role in the storage of water, non-structural carbohydrates and storage proteins (Rosell 2016).

Detailed explanation-2: -Phloem transports food from leaf to other parts of the plant.

Detailed explanation-3: -Food and other organic substances (e.g., some plant hormones and even messenger RNAs) manufactured in the cells of the plant are transported in the phloem. Sugars (usually sucrose), amino acids and other organic molecules enter the sieve elements through plasmodesmata connecting them to adjacent companion cells.

Detailed explanation-4: -Phloem is a vascular tissue helps in the transportation of food. The end product of photosynthesis is glucose [C6H12O6] synthesized in leaves and transported to the various storage organs like flowers, fruits, seeds and tubers etc.

There is 1 question to complete.