Concept explainers
Introduction: The underground branching root systems are often more extensive than aerial part of plant. The extension of root depth and spread of a plant differ for another plant species and it also varies among individuals of same species. For the survival of plant, firm anchorage is essential so that the stem remains upright that enable leaves to absorb sunlight efficiently. The roots absorb water and dissolved minerals. The dissolved minerals are transported from roots to the leaves throughout the plant in the xylem.
Answer to Problem 1TYU
Correct answer: One main root, formed from the enlarging embryonic root, with many smaller lateral roots branching off it is called a taproot system. Hence, the correct answer is option (c).
Explanation of Solution
Reason for the correct answer:
Option (c) is given as “a taproot system”.
The root system that contains one main root formed from the seedling enlarging embryonic root (radicle) is known as tap-root system. There are many lateral roots of several sizes branch out of the taproot.
Hence, the correct answer is option (c).
Reasons for incorrect answers:
Option (a) is given as, “a fibrous root system”. A root system consists of many roots that are similar in size developed from the stem end is known as fibrous root system. Hence, option (a) is incorrect.
Option (b) is given as, “an adventitious root system”. Some roots that arise from an organ like stem or leaf is known as adventitious root system. Hence, option (b) is incorrect.
Option (d) is given as, “a storage root system”. Storage root systems are specially modified root for starch and water storage. Hence, option (d) is incorrect.
Option (e) is given as, “a prop root system”. The modified root that arises from the stem of some plants and gives additional support is known as a prop root system. Hence, option (e) is incorrect.
Hence, the options (a), (b), (d), and (e) are incorrect.
One main root formed from the enlarging embryonic root with many smaller branching lateral roots is called as taproot system.
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Chapter 36 Solutions
EBK BIOLOGY
- The phase change of an apical meristem from the juvenile tothe mature vegetative phase is often revealed by(A) a change in the morphology of the leaves produced.(B) the initiation of secondary growth.(C) the formation of lateral roots.(D) the activation of floral meristem identity genes.arrow_forward6) Match the tissue on the left with the description of the function it generally performs for the plant on the right: a) phloem flexible support, such as in petioles and herbaceous stems. b) xylem forms an outer barrier for leaves, young stems and roots. c) collenchyma conducts water and dissolved nutrients from the roots to other plant tissues. support of vascular tissue in older woody plants and formation of very hard plant structures such as nut shells. d) periderm e) parenchyma metabolism and storage. f) sclerenchyma conducts molecules produced by the plant throughout the plant body. g) epidermis provides physical protection for woody plants. AP ACMIarrow_forwardDraw illustrations to bring out the anatomical difference between(a) Monocot root and Dicot root(b) Monocot stem and Dicot stemarrow_forward
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- From the viewpoint of the plant, can you suggest a practical reason for branch roots originating internally instead of at the surface?arrow_forwardDiscuss in detail the origin, structure and function of a root apex.arrow_forwardIn root morphology there are three zones. What are the three zones and what roles do they play?arrow_forward
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