Class 9 Science
Question 1: Which of these plant parts would have apical meristem?
Answer: (c) Tip of Stem
Question 2: Which of these is an example of secondary growth?
Answer: (d) Increased thickness of stem
Question 3: What is a tissue?
Answer: A group of similar or dissimilar cells which performs a specific task is called tissue.
Question 4: What do you understand by meristematic tissue?
Answer: Tissues which are found in the regions of plant growth are called meristematic tissue. The cells of meristematic tissue keep on dividing continuously.
Question 5: What is differentiation?
Answer: When the cells of a tissue attain a specialized function; the process is called differentiation.
Question 6: Which are the two main types of plant tissues?
Answer: Plant tissues are of two main types:
Question 7: What is the need of tissues for a living being?
Answer: In unicellular organisms; all the functions are performed by a single cell. Once an organism becomes complex; it is not possible for a single cell to perform all the functions. A division of labour is necessary to attain specialization of tasks. Formation of tissues results in specialization which increases the efficiency of a living being. Hence, complex living organisms need to make tissues.
Question 8: Write the name of permanent tissue has chlorophyll?
Answer: (b) Chlorenchyma
Question 9: The example of sclerenchyma is
Answer: (c) coconut
Question 10: In sclerenchyma tissue which substances responsible for make it strong and thickend?
Answer: (c) Lignine
Question 11: The food transported from leaves to other parts of plants by.
Question 12: Name types of simple tissue.
Answer: Parenchyma, collenchymas and sclerenchyma are the types of simple tissue.
Question 13: Which tissue makes up the husk of coconut?
Answer: Sclerenchyma makes up the husk of coconut.
Question 14: What is xylem?
Answer: Xylem is the type complex tissue which carry water and mineral in upwards direction.
Question 15: What are the constituents of phloem?
Answer: Sieve tubes, companion cells, phloem fibers and the phloem parenchyma are the constituents of phloem.
Question 16: How are simple tissues different from complex tissues in plant?
Answer: The simple tissues are made of one type of cells and complex tissues are made of one or more types of cells.
Question 17: What is the functions of the stomata?
Answer: Stomata helps in exchanging of the gases with the atmosphere and Transpiration also takes place through stomata.
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