Q1. Name the tissues responsible for the movement of the body.
Ans. Muscle tissue and nervous tissue
Q2. How does neuron look like?
Ans. A neuron is the unit cell of nervous tissue. It is a thread-like structure with cell body and axon.
Q3. Name the types of simple tissues.
Ans. (a) P arenchyma (b) C ollenchyma (c) Sclerenchyma
Q4. Name the types of complex tissues.
Ans. Xylem and phloem.
Q5. Where is apical meristem found?
Ans. It is present at the growing tips of stem and root, it increases the length of the stem and roots.
Q6. Which tissue make up the husk of coconut?
Q7. What are the constituents of phloem?
Ans. Phloem constitutes the sieve tubes, companion cell, phloem parenchyma and phloem fibres.
Q8. Define aerenchyma.
Ans. The cells of aerenchyma have air-filled large cavities present in parenchyma, and helps aquatic plants in floating.
Q9. What is the utility of tissues in multicellular organisms?
Ans. Tissves help in growth, organisation of different organs and performing different functions.
Q10. Name the two types of tissues.
Ans. Plant tissues and animal tissues.
Q11. Name the two types of plant tissue.
Ans. Meristematic tissue and permanent tissue.
Q12. What is differentiation?
Ans. The process of taking up a permanent shape, size and function by cells is called differentiation.
Q13. Name the three types of meristematic tissues.
Ans. The three types are: (a) Apical tissue—tips of root and shoot (b) Lateral tissue—sides of stem (c) Intercalary tissue—at nodes
Q14. Where is apical tissue found?
Ans. Apical tissue is present at the tips of roots and stems.
Q15. Tissues present at the lateral surface of the stem are called apical tissues. Put (T) if true and put (F) if false.
Rewrite the answer if (F).
Ans. (F). Tissues present at the lateral surface of the stem are called lateral tissue.
Q16. Which tissues are present at the nodes of the plants?
Ans. Intercalary tissue.
Q17. What are the various types of blood cells?
Ans. There are three types: (a) RBC’s (b) WBC’s and (c) Platelets.
Q18. What are tracheids?
Ans. Tracheids are elongated cells with tapering ends.
Q19. What are guard cells?
Ans. Each stomata is bounded by a pair of specialised kidney-shaped epidermal cells called guard cells.
Q20. Epithelial tissue is the simplest tissue. Write (F) for false or (T) for true.
Q21. What are the functions of cuboidal epithelium?
Ans. It helps in absorption, excretion, secretion and also provides mechanical support.
Q22. What does plasma contain?
Ans. The plasma contains proteins, salts and hormones.
Q23. What do you mean by differentiation?
Ans. The cells of permanent tissue loose the capacity to divide and attain a permanent shape, size and function.
Q24. How are simple tissues different from complex tissues in plant?
Ans. The simple tissues are made of one type of cells and complex tissues are made of one or more types of cells.