can any one give me photos of class 9 science chapter- tissue notes.
Answers
Explanation:
Question 1.
Name any two types of simple permanent plant tissues.
Answer:
The simple permanent tissues of plants are: Parenchyma, collenchyma and sclerenchyma.
Question 2.
What are blood platelets?
Answer:
Blood platelets are the cell fragments present in the plasma of blood which help in the clotting of blood.
Question 3.
Name the connective tissue that is found between skin and muscles.
Answer:
Areolar tissue.
Question 4.
Name the tissue present in the brain.
Answer:
Nervous tissue which comprises of its basic unit called neurons.
Question 5.
In which of the simple plant tissue, deposition of lignin is found?
Answer:
Sclerenchyma.
Question 6.
Name the basic packing tissue of plant.
Answer:
Parenchyma.
Question 7.
Name the tissue which is present in the veins of leaves.
Answer:
Sclerenchyma.
Question 8.
Why is cork impervious to gases and water?
Answer:
Due to presence of a chemical substance called suberin.
Question 9.
What is the function of phloem?
Answer:
Phloem helps in the transport of food from leaves to the various parts of the plant.
Question 10.
Which body cell provides resistance against infections?
Answer:
White blood cells (WBC) provide resistance against infections.
Question 11.
Which biochemicals compose the solid matrix of cartilage?
Answer:
Proteins and sugars make up the solid matrix of cartilage.
Question 12.
Name the connective tissue which helps in the repair of tissues.
Answer:
Areolar connective tissue helps in the repair of tissue.
Question 13.
Which connective tissue is specialised for fat storage and acts as heat insulator?
Answer:
Adipose tissue helps in storage of fats and acts as heat insulator.
Question 14.
Which muscle has spindle-shaped cells?
Answer:
Smooth muscle cells have spindle shaped cells.
Question 15.
Which meristem is present at growing tips of stems and roots?
Answer:
Apical meristem is present at the growing tips of the stem and roots.
Tissues Class 9 Extra Questions Short Answer Type 1
Question 1.
List any four salient features of meristematic tissue.
Answer:
The salient features of meristematic tissue are:
This tissue consists of cells which continuously divide to produce new cells.
The cells of this tissue lack vacuoles.
The cells of this tissue have dense cytoplasm.
The cells of this tissue have thin cellulosic cell walls and prominent nuclei.
Question 2.
Write the four elements of xylem.
Answer:
The four elements of xylem are tracheids, vessels, xylem parenchyma and xylem fibres.
Question 3.
How is ligament different from tendons?
Or
Differentiate between tendon and ligament.
Answer:
Ligament is a connective tissue which joins bone to bone and is elastic in nature.
Tendons join bone to muscles and are less elastic as compared to the ligaments.
Question 4.
Write a short note on the different types of meristematic tissue with their location and functions in the plants.
Answer:
The meristematic tissues are classified as apical, lateral and intercalary meristematic tissue based on the region where they are present.
Apical meristem – It is present at the growing tips of stem and roots and results in increase in the length of the stem and the root. Lateral meristem (cambium): It is present on the lateral sides of stem and roots. It helps to increase the girth of the stem or root.
Intercalary meristem – It is present at the base of the leaves or internodes. It helps in the longitudinal growth of plants.
Question 5.
Show the diagrammatic representation of location of lateral meristem and intercalary meristem in plant body.
Answer:
Tissues Class 9 Extra Questions and Answers Science Chapter 6 1
Question 6.
Differentiate between chlorenchyma and aerenchyma.
Or
Write the difference between aerenchyma and chlorenchyma.
Answer:
Chlorenchyma:
It is a type of parenchyma which contains chlorophyll.
It helps to perform photosynthesis.
It is present in green parts of plants like the leaves.
Aerenchyma:
This type of parenchyma that has large air cavities in it.
It helps to provide buoyancy to the plants.
It is present in the aquatic plants, example in their floating leaves.
Question 7.
Write the functions of collenchyma in plants.
Answer:
Collenchyma allows easy bending in various parts of a plant (leaf, stem) without breaking. It also provides mechanical support to plants like in the leaf stalks below the epidermis.
Question 8.
What are the roles of epidermis in plants?
Answer:
The functions of epidermis are:
Epidermis is usually made up of a single layer of cells and gives protection.
The epidermis may be thicker in some plants living in dry habitats or often secrete a waxy, water- resistant layer on their outer surface called cutin (chemical substance with waterproof quality) to prevent water loss.
The epidermis of leaves have small pores called as stomata which help in gaseous exchange and transpiration.
The epidermal cells of roots bear root hairs that greatly increase the total absorptive surface area of the roots for absorption of water.