Previous Chapter 5
Q1. Define the term “tissue” ?
Answer:
A group of cells having similar structure and
function is called as tissue.
Q2. How many types of elements together make
xylem tissue? Name them.
Answer:
Xylem tissue is made up of four types of elements
are – Tracheids, Vessels, Xylem parenchyma and xylem fibers.
Q3. How are simple tissues different from complex
tissues in plants/
Answer:
Simple tissues are made up of only one type of
cell which perfoms similar functions
whereas
Complex tissues are made up of more than one type
of cells and can perform similar functions.
Q4. Differntiate between parenchyma, collenchyma
and sclerenchyma on the basis of cell wall.
Answer:
For Parenchyma the cell wall is thin and made up
of cellulose.
For collenchyma the cell wall is thick.
For sclerenchyma the cell wall is thick at the
corners due the deposition of pectin.
Q5. What are the functions of stomata?
Answer:
The functions of stomata are:
a. Invovled in the exchange of gases.
b. Removal of excess water by the process of transpiration
Q6. Diagrammatically show the difference between
the three types of muscle fibres.
Q7.Differentiate between striated , unstriated
and cardiac muscles on the basis of their structure and site/location in the
body.
Answer:
Striated Muscle
|
Unstriated muscle
|
Cardiac muscle
|
Cells are long,
cylinderical and unbranched
|
Cells are long ,
triangular and unbranched
|
The cells are
cylinderical and branched
|
Multiple nuclei
are present on the periphery
|
Single centrally
located nuclei
|
One/two centrally
located nuclei
|
Found in hand ,
feet and other skeletal muslces
|
Make the walls of
stomach, intestine , bronchi
|
Cardiac muscles
are in found in the heart
|
Q8. What is the function of cardiac muscle?
Answer:
Cardiac muscle helps in the rhythmic contraction
and relaxation of heart wall throguhout the life.
Q 9. Draw a labelled diagram of neuron
Answer:
Q10. Name the following
a. Tissues that forms the inner lining of our mouth
b. Tissue that connects muscle to bone in humans
c. Tissue that transport food in plants
d. Tissue that stores fats in our body
e. Connective tissue with a fluid matrix
f. Tissue present in the brain
Answer:
a. Squamous epithelium
b. Tendon
c. Phloem
d. Adipose tissue
e. Blood
f. Nervous tissue
Q11. Identify the types of tissue in the
following :
Skin, bark of tree, bone, lining of kidney
tobule, vascular bundle
Answer:
a. Skin – squamous epithelium
b. Bark of tree – cork
c. Bone – connective tissue
d. Lining of kidney tubule – cuboidal epithelium
e. Vascular bundle – conductive tissue
Q12. Name the regions in which parenchyma tissue
is present.
Answer:
Parenchyma tissue is present in cortex and marrow
of roots and stems. When it brears chlorophyll, it is found in green leaves.
Q13. What
is the role of epidermis in plants?
Answer:
The epidermis forms a continous layer or covering
without any intercellular space. It protects all the plants.
Q14. How does cork act as a protective tissue?
Answer:
Cork acts as protective layer beacuse
i.
Cork has dead cells and
forms layer without leaving any intercellular space.
ii.
Suberin is deposited on its
wall which makes it able to help the exchange of gases.
Q15. Complete the table:
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