H. Short answer questions
1. Give two important characteristics of meristematic cel
2. Where are meristematic tissues present in a plant?
3. Name the cells that have lignin thickenings.
4. What is the main function of xylem tissue?
1:1
Answers
Explanation:
Meristematic cells are actively dividing undifferentiated cells present at different locations in a plant body which helps in the primary (apical and intercalary meristem) and secondary growth (lateral meristem) in plants.
The characteristics of meristematic cells are:-
1)The cells are isodiametric with thin cellulosic cell walls with no secondary cell wall.
2) They divide rapidly hence, there is no stored food in these cells.
3) They are compactly arranged cells with no intercellular spaces.
4) They have a dense cytoplasm with a prominent nucleus.
5) Endoplasmic reticulum and mitochondria are not fully developed in these cells.
6) They are the most metabolically active cells.
So, the correct answer is 'Thin wall, dense protoplasm, no intercellular spaces, isodiametric and nucleate'.
Answer:
Characteristics of Meristematic tissues :-
1 . Meristematic cells are oval and small and have thin walls. there are no intercellular spaces.
2. the nuclei are large and centrally located.
3. vacuoles are either absent or very small.
ANS - 2 - 1 - Meristematic tissues are present in plant because they help plants to growth in length as well as in girth .
2 - All new organs like buds , flowers and new leaves and branches arise by the new cells formed by the division of Meristematic cells.
ANS - 4 - Main function of xylem tissue is to transport water and minerals from roots up to the leaves.
3 ANS - I don't know.
I hope it will help you