EXERCISES
A. VERY SHORT ANSWER TYPE QUESTIONS
1. What kind of roots does a mustard plant have ?
2. Which type of root shows-a) reticulate venation (b) parallel venation ?
3 Name a plant having stilt roots.
4. What is the broad green part of a leaf called ?
5. What is the innermost swollen part of pistil called ?
B. SHORT ANSWER TYPE QUESTIONS
1. Name the openings through which a leaf breathes. Where are these opening
2. Write the equation describing photosynthesis.
3. Mention two major functions of roots.
4. What is pollination ?
5. What is the difference between parallel and reticulate venation ?
Answers
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Explanation:
The type of roots present in mustard plant is tap roots.
Mustard is dicot plant. Therefore, tap root system is present in mustard. Mustard root is classified as an annual and is a member of the Brassicaceae or Cruciferae family, botanically known as Brassica juncea.
Answer: Yes, it is possible to find whether a plant has tap root or fibrous root by looking at the impression of its leaf on paper. If the leaf has parallel venation, the roots of the plant will be fibrous root and if the leaf has reticulate venation, the root is tap root
Stilt roots (Brace roots): The aerial, adventitious obliquely growing roots that develop from the lower nodes of the stem to give additional support are called stilt roots. These roots bear several large overlapping root caps called multiple root caps. e.g., Sugarcane, Pandanus, Rhizophora, Sorghum and Maize.
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