BOTANY Higher Secondary Second Year - Textbooks Online

Self evaluation
I . Choose and write the correct options.
1. The vascular bundle with protoxylem facing centre of the stem is
a. exarch b. endarch
c. tetrarch d. polyarch
2. When the xylem and the phloem lie in the same radius, the vascular
bundle is called
a. conjoint b. radial
c. open d. closed.
3. The vascular bundles are skull shaped in
a. dicot root b. monocot root
c. dicot stem d. monocot stem.
4 The protoxylem lacuna is present in the vascular bundles of
a. dicot root b. monocot root
c. dicot stem d. monocot stem
II. Answer the following questions in two or three sentences.
5. What is a hypodermis?
6. What is a protoxylem lacuna?
7. What is an eustele?
III. Answer the following questions in about 100 words.
8. What is the nature of the vascular bundles in monocot stem?
9. Write short notes on the cortex in dicot stem.
10. Write short notes on the vascular bundles of the dicot stem.
11. Differentiate the vascular bundles of the dicot stem from that of
monocot stem.
12. Draw and label the parts of a T.S. of a dicot stem.
IV. Answer the following questions in about 200 words.
13. Write anatomical differences between dicot stem and monocot
stem.
14. Describe the primary structure of a monocot stem.
15. Describe the primary structure of a dicot stem.
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