A nail is inserted in the trunk of a tree at a height of 1 metre from the ground level. After 3 years the nail will:
$$\textbf{Correct option:}$$ Option C
$$\textbf{Explanation for correct option:}$$
Option C
$$\bullet$$ Plants grow with the help of meristematic tissues.
$$\bullet$$ Apical meristems are tissues responsible for the elongation of root or shoot which only occurs at the tips whereas, lateral meristems help the plant to increase in girth i.e. widening the stem.
$$\bullet$$ Since meristems are not present at the bottom of the stem, the stem will not grow from the base.
$$\bullet$$ Thus, the inserted nail will stay at the same height even after 3 years.
$$\textbf{Explanation for incorrect options: }$$
Options A, B, and D: The nail will not move downwards, upwards, or sideways because the stem has permanent tissue which has lost its capacity of dividing after becoming mature,
$$\textbf{Conclusion:}$$ Thus, even after 3 years, the inserted nail will remain at the same position or height of 1 metre from the ground level..
Mention the ploidy of the following: 1. Protonemal cell of a moss, 2. Primary endosperm nucleus in dicot, 3. Leaf cell of a moss, 4. Prothallus cell of a fern, 5. Gemma cell in Marchantia, 6. Meristem cell of a monocot, 7. Ovum of a liverwort, 8. Zygote of a fern.
Meristematic tissues are composed of
Read the following statements regarding meristematic cells and select the correct ones. (i) Cells possess the ability to grow and divide. (ii) Cells have dense cytoplasm with prominent nucleus. (iii) Well developed ER and mitochondria are present.
Select the correct option: The growth of roots and stems in length with the help of apical meristem is called
Select the correct option: Which one of the following is not a characteristic of meristematic cells?
Meristematic cells are characterized by
In virus-infected plants the meristematic tissues in both apical and axillary buds are free of virus because
Give reasons for Meristematic cells have a prominent nucleus and dense cytoplasm but they lack vacuole.
Which of the following statements is not related to meristematic tissue?
In virus-infected plants the meristematic tissues in both apical and axillary buds are free of virus because