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Biology: The Unity and Diversity o...
Biology: The Unity and Diversity o...
Tracheids are part of ______.
- a. cortex
- b. mesophyll
- c. phloem
- d. xylem
Introduction: Xylem contains elongated cells called as tracheids to transport water and minerals from the root to the leaves of the plants. Presence of tracheids is the main characteristics of vascular plants; otherwise, the plants are called as non-vascular plants. Tracheids function as major vessels for water transport and also provide structural support to the plants.
Reason for the correct answer: Tracheids are the primal element of xylem vessels that consist of a long cell with pointed ends. These cells are characterized by numerous pits but they don’t have pores in them.
Option d. is given as, “xylem”. Tracheids present in the xylem vessel have higher surface area and volume. Therefore, they can hold maximum amount of water and transport it to the leaves against gravity.
Hence, the correct answer is option d.
Reasons for the incorrect answers:
Option a. is given as, “cortex”.
The outermost layer of the root and stem of a plant is called as cortex. Cortex consists of outer epidermal and endodermal cells. They are the root cells meant for carrying water from the soil to the central cylinder of root and store carbohydrate as starch in the roots and stem (barks) of plants...
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