Q1) Name the associated structure of companion cell.
Ans: Sieve tube cell
Q2) Name an enucleated plant cell.
Ans: Sieve tube cell
Q3) Name the conductory elements of xylem.
Ans: Tracheary elements- Tracheids and Vessels (tracheae)
Q4) What is periderm?
Ans: Phellogen, Phellum and Phelloderm are collectively called as Periderm
Q5) What is annual ring?
Ans: Springwood and autumn wood that appear as alternate concentric rings constitute an annual ring.
Q6) Name the meristem which is responsible for growth in diameter of the cortex.
Ans: Cork Cambium
Q7) What is intrafascicular cambium?
Ans: Cells of cambium present between primary xylem and primary phloem.
Q8) What is interfascicular cambium?
Ans: The cells of the medullary rays, adjoining the intrafascicular cambium become meristematic to form interfascicular cambium.
Q9) Name the outermost layer of stele.
Ans: Endodermis
Q10) What is plant anatomy?
Ans: Study of internal structure of plants.
Q11) Mention the different types of meristems.
Ans: Apical meristem, intercalary meristem and lateral meristem.
Q12) What is simple permanent tissue?
Ans: The cells of the permanent tissue having all cells similar in structure and function are called simple tissues.
Q13) What is complex permanent tissue?
Ans: Permanent tissues having many different types of cells are called complex tissues.
Q14) What are sclereids?
Ans: Sclereids are spherical, oval or cylindrical, highly thickened dead cells with very narrow cavities.
Q15) Name a dead mechanical tissue.
Ans: Sclerenchyma.
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