Question:
Explain the statement 'Tissues exhibit division of labour'. Give examples.
Answer:
In multicellular organisms, there are millions of cells. Each specialised function is taken up by a different group of cells called tissue. Or Group of cells, forming a tissue are capable of doing a particular function efficiently. Thus Different tissues carry out different types of functions. E.g. In human beings, muscle cells contract and relax to cause movement, nerve cells carry messages, blood flows to transport oxygen, food, hormones and waste material and so on. In plants, vascular tissues conduct food and water from one part of the plant to other parts. So, multicellular organisms show the division of labour.
Tissues
Q 1.
Fill In the Blanks :
The study of the structure of tissues and organs is known as ______ .
Q 2.
Which connective tissue connects bones to muscles?
Q 3.
How are complex tissues different from simple tissues?
Q 4.
Name the fat-storing tissues? Where are they located? How do these tissue help?
Q 5.
Which tissues are called covering or protective tissues?
Q 6.
What is the main function of cuboidal epithelium?
Q 7.
Fill In the Blanks :
Permanent tissues are those which have lost the capacity to _____.
Q 8.
What is main purpose of stratified epithelium?
Q 9.
How does epidermis help xerophytes?
Q 10.
Based on functions performed, list the types of animal tissues.
Q 11.
Where do we find epithelial tissues on animal body?
Q 12.
What are different types of muscle tissues? Also list which of these are voluntary or involuntary.
Q 13.
Name the following:
Isodiametric cells, thin cell wall, large vacuoles, living, packing tissue in plants
Q 15.
Which tissues are responsible for the axial growth of plants?
Q 16.
Why are Xylem and Phloem are called vascular or conducting tissues?
Q 17.
Which plant tissue is considered to have played an important role in the survival of terrestrial plants?
Q 18.
Identify the location of the following connective tissues.
(a) Blood
(b) Lymph
(c) Bone
(d) Cartilage
(e) Tendons
Q 19.
Where do we find Areolar tissue? What are its functions?
Q 20.
How long a nerve cell can be?
Q 21.
Name the following:
Tissue that transports food in plants
Q 22.
Name the following:
Tissue that connects muscles to bone in humans
Q 23.
Name the following:
Plant tissue help in bending leaf stalk
Q 24.
Why do plants have more dead tissues as compared to animals?
Q 25.
Why do animals tissues require more energy as compared to plant tissues?
Q 26.
Which tissue makes up the husk of coconut?
Q 27.
Which tissues are responsible for the secondary growth of plants?
Q 28.
What is the shape of Parenchyma cells?
Q 29.
Which tissue primarily attributes to easy bending of various parts of plants (like stem, leaves)?
Q 30.
Which tissue is known as living mechanical tissue?
Q 31.
Why the cell walls of collenchyma tissues are unevenly thickened?
Q 32.
Name two types of complex tissues.
Q 33.
List functions of phloem tissue?
Q 34.
Why are Xylem and Phloem known as complex permanent tissues?
Q 35.
Where do you find simple squamous in an animal body?
Q 36.
What is simple stratified epithelium? Where do we find these tissues?
Q 37.
What is the common characteristic in different connective tissues?
Q 38.
Name different types of connective tissues?
Q 39.
Name the two fluid connective tissues.
Q 40.
Which connective tissue connects two bones?
Q 41.
Name the constituents of matrix found in cartilage.
Q 42.
What are identification marks of striated muscles when seen under microscope?
Q 43.
Identify which type of muscles tissues are associated with the following body actions
(a) locomotion
(b) iris movement to control size of pupil
(c) peristaltic movements of the oesophagus
(d) heart beat
(e) movement of blood in blood vessels
Q 44.
What is the unit of nervous tissues?
Q 45.
How are muscles tissues related to nerve cells?
Q 46.
Fill In the Blanks :
____________ is the parenchyma with large number of chloroplasts.
Q 47.
Name the following:
Tissue that forms the inner lining of our mouth
Q 48.
Name the following:
Tissue that stores fats in our body.
Q 49.
Identify which of the following plant tissues are living or dead?
Apical Meristem, Parenchyma, Aerenchyma, Collenchyma, Sclereids, Tracheids, Xylem Fibres, Xylem Parenchyma, Phloem fibre, Phloem Parenchyma, Vessel, Sieve Tubes
Q 50.
Name types of simple tissues.
