Worksheet
1. What is a tissue?
2. What are meristematic
tissues?Explain the features of meristematic tissues.
3. Define the following terms and write their functions -
a) Apical meristem
b) Lateral meristem
c) Intercalary meristem
4. What are the characteristics features of Permanent Tissues?
5. Write the different types of Permanent Tissues.
6. Fill in the blanks with appropriate answers -
a) Parenchyma with chlorophyll which perform photosynthesis is_______________.
b) _____________ is the type of simple permanent tissue which provides flexibility to the plant.
c) Mechanical support to the plant is provided by ____________.
d) __________ meristem is present in the growing tips of stems.
Answers
Answer:
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1. Tissue is the mass of cells that form the bodies of humans, animals and plants.
2. Meristematic tissue contains undifferentiated cells which are the building blocks of the specialized plant structures. Meristematic tissues contain living cells with varied shapes.
Features of meristematic tissue:
They trigger the growth of new cells in young seedling at the tips of root and shoots and forming buds.
3. Apical meristem-->This meristem are located on the tips of root , shoot and etc. They are usually help in the growth of stem as well as roots also.
Lateral meristem-->The lateral meristems are present on the lateral side of the stem and root of a plant. These meristems help in increasing the thickness of the plants.
Intercalary meristem-->The intercalary meristems are located at the internodes or the base of the leaves. The intercalary meristems help in increasing the length of the internode.
4. Characteristic features of permanent tissues:
(i) Cell walls may be thin or thick.
(ii) Cells may contain reserve, excretory or secretory substances.
(iii) Intercellular spaces may be present or absent. (iv) Metabolic activities are relatively slow.
5. There are 3 types of permanent tissue they are:
(i) parenchyma
(ii) collenchyma
(iii) sclerenchyma
6. (a) Chlorenchyma
(b) simple permanent tissue
(c) collenchyma and sclerenchyma
(d) Apical meristem