Correct Answer:
(A) Transportation of food
Phloem also called ‘bast’ tissues in plants that carry food produced in the leaves to all other parts of the plant. Phloem is composed of various specialized cells called sieve tubes, companion cells, phloem fibres and phloem parenchyma cells.
Ques: 2
Consider the following statements:
Assertion (A) : Cuscuta (Amarbel) is an example of parasitic angiosperm.
Reason (R) : It gets its nutrition from the leaves of the host plant.
Choose your answer from the code given below:
(A) and (R) are true, and (R) is the correct expla nation of
(A).
Correct Answer:
(D)
Assertion (A) is true, but (R) is false.
Cuscuta is a rootless, yellow coloured plant with a slender stem which twines around the stem of the host. It is an ex- ample of parasitic angiosperm. It develops haustoria which enter the host plant forming contact with xylem and phloem of the host. It absorbs the prepared food, water and minerals from the host plant.
Ques: 3
Crop logging is a method of -
Correct Answer:
(B) Plant analysis for assessing the requirement of nutrients for crop production
Crop-logging may be of great help to determine the adequate levels of different nutrients for good plant growth and high yield. The concept of crop-logging was developed by Clements of USA for the growing of sugarcane in Hawaii, where the fertilizer requirements of this crop are greatly influenced by weather and climate. Crop-logging is a method of plant analysis for assessing the requirement of nutrients for crop production.