Practice Questions with Solutions: Tissues

Q1: The tissues given below are called as:
(a) meristematic tissues
(b) permanent tissues
(c) complex tissues
(d) all of these
Ans: (c)
Explanation: The tissues shown are made up of more than one type of cell that perform different functions together (for example, xylem and phloem). Such tissues are called complex tissues because they are composed of different kinds of cells working as a unit.
Q2: Read the given statements and select the correct ones.
1. There is no demarcation of dividing and nondividing regions in animals.
2. Animals consume less energy as compared to plants.
3. Most of the tissues that plants contain are living.
4. Structural organization of organs and organ systems are more specialised animals than even in very complex plants.
5. Growth of animals is indefinite.
(a) 2, 3 and 5
(b) 2, 3 and 4
(c) 1 and 4
(d) 1 and 5
Ans : (c)
Explanation: Statement 1 is correct because animals have distinct regions of cell division (for example, growth and repair occur at specific places) and there is no continuous meristem-like region as in plants. Statement 4 is correct because animals generally show more specialised organs and organ systems for particular functions. Statement 2 is incorrect - animals usually consume more energy than plants because of movement and active behaviour. Statement 3 is incorrect because many supportive plant tissues (like some xylem elements) are dead and provide mechanical support. Statement 5 is incorrect because animal growth is generally limited; animals do not grow indefinitely.
Q3: Parenchyma cells containing air cavities are called
(a) aerenchyma
(b) sclerenchyma
(c) chlorenchyma
(d) prosenchyma
Ans: (a)
Explanation: In aquatic plants, parenchyma cells often develop large intercellular air spaces to store gases and give buoyancy. Parenchyma with these air cavities is called aerenchyma, and it helps the plant to float and exchange gases.
Q4: Find the living cells that provides mechanical strength to the plant.
(a) Parenchyma
(b) Collenchyma
(c) Sclerenchyma
(d) Sclerotic cells
Ans: (b)
Explanation: Collenchyma cells are living and have thickened cell walls (usually at the corners) that provide flexible mechanical support to growing parts of the plant such as young stems and leaf stalks. Sclerenchyma also provides strong support but its cells are usually dead at maturity, so it is not the correct option when a living tissue is asked for.
Q5: Which of these types of cells is most likely to divide?
(a) Epidermis
(b) Parenchyma
(c) Meristem
(d) Xylem
Ans : (c)
Explanation: Meristem regions contain actively dividing, undifferentiated cells (meristematic cells). These regions, such as the shoot and root tips, are the primary sites where new cells are produced for growth.
Q6: What is chlorenchyma?
(a) It is a simple permanent tissue
(b) It is a parenchymatic tissue of green leaves and stems
(c) It is a photosynthetic in nature
(d) All of the above
Ans: (d)
Explanation: Chlorenchyma is a type of parenchyma (a simple permanent tissue) whose cells contain chloroplasts. It is found in green leaves and stems and performs photosynthesis, so all the given statements are correct.
Q7: Tracheids, vessels, wood fibres and parenchymatous tissues are found in
(a) xylem
(b) cambium
(c) cortex
(d) phloem
Ans: (a)
Explanation: These components - tracheids, vessels, xylem fibres and xylem parenchyma - are the cellular parts of xylem, the complex vascular tissue responsible mainly for conducting water and dissolved minerals from the roots to the rest of the plant.
Q8: Identify the features of striated muscles.
(a) Cylindrical, striped, skeletal and voluntary
(b) Spindle, unbranched and uninucleated
(c) Cylindrical, unstriped and without nucleus
(d) Cylindrical, striped and branched
Ans: (a)
Explanation: Striated (skeletal) muscles have long cylindrical fibres showing alternate light and dark bands (striations). They are attached to the skeleton, are under voluntary control and are usually multinucleated and unbranched.
Q9: There are specific regions of plant body that constantly remain in the state of division. What are they?
(a) Perisperm
(b) Endosperm
(c) Meristem
(d) Stele
Ans: (c)
Explanation: A meristem is a plant tissue made up of undifferentiated, actively dividing cells. Meristems occur at places such as the tips of roots and shoots where continuous growth takes place.
Q10: Muscles, which are immune to fatigue are
(a) unstriped muscles
(b) cardiac muscles
(c) jaw muscles
(d) skeleton muscles
Ans: (b)
Explanation: Cardiac muscle cells contract rhythmically and continuously without conscious control and are highly resistant to fatigue. This property is essential for the continuous pumping action of the heart.
Q11: Which of the following helps in increasing the width and the girth of the plants?
(a) Apical meristem
(b) Lateral meristem
(c) Intercalary
(d) Permanent tissue
Ans: (b)
Explanation: Lateral meristems (for example, vascular cambium) divide mainly in a plane that increases the diameter of stems and roots, producing secondary tissues that increase the plant's girth or thickness.
Q12. Which of these features is associated with plasma membrane?
(a) Permeable
(b) Impermeable
(c) Selectively permeable
(d) Both (a) and (b)
Ans : (c)
Explanation: The plasma membrane allows certain substances to pass while preventing others. Small molecules like oxygen and carbon dioxide pass by diffusion, and water moves by osmosis. Because it controls what enters and leaves the cell, it is called selectively permeable.
Q13. Which of the following meristems helps to increase girth of the stem?
(a) Apical meristem
(b) Lateral meristem
(c) Intercalary meristem
(d) Vertical meristem
Ans: (b)
Explanation: Lateral meristem (such as the cambium) produces new cells that add to the thickness of stems and roots, leading to an increase in girth (secondary growth).
Q14: Read the given statements.
1. Many nerve cells bound together by connective tissue make up a nerve.
2. Areolar connective tissue fills the space inside the organs and helps in repair of tissues.
3. Glandular epithelium is formed by infolding of epithelial tissue.
4. Smooth muscle fibres show characteristic of both striated and unstriated muscles.
5. Skin epithelial cells are extremely thin and flat through which absorption and secretion occur.
Select the incorrect statements.
(a) 4 and 5
(b) 1, 3 and 5
(c) 1, 2 and 3
(d) 2, 3 and 4
Ans: (a)
Explanation: Statements 4 and 5 are incorrect. Statement 4 is wrong because smooth muscle fibres are unstriated and do not show features of striated muscle. Statement 5 is wrong because skin epithelium (for example, the epidermis) is usually multiple layers of cells that provide protection; it is not extremely thin and flat for absorption and secretion.
Q15:  Identify the tissue that is present in leaf stalks below the epidermis.
(a) Collenchyma
(b) Sclerenchyma
(c) Parenchyma
(d) Xylem
Ans: (a)
Explanation: Collenchyma cells typically form continuous strands just beneath the epidermis in stems and leaf stalks (petioles). Their thickened corners give flexible support to these parts.

Q16: Which of the following tissues provides flexibility and mechanical support to the plant organs?
(a) Collenchyma
(b) Sclerenchyma
(c) Parenchyma
(d) Chlorenchyma
Ans: (a)
Explanation: Collenchyma is a living tissue with cell walls thickened by cellulose and pectic substances at the corners. This structure gives flexibility and mechanical support, especially to young and growing aerial parts like stems and leaves, allowing them to bend without breaking.
Fill in the blanks.
Q17: Though cardiac muscle resembles the striated muscle but it is an .......... muscle.
Ans : Involuntary muscle
Explanation: Despite its striated appearance, cardiac muscle functions without conscious control; it contracts automatically to pump blood and is therefore classified as an involuntary muscle.
Q18: Meristematic tissue is found in the growing tips of .......... and ..........
Ans : Root, stem
Explanation: Meristematic tissue is present at the tips of roots and stems (apical meristems), where active cell division causes lengthwise growth of the plant.
Q19: .......... muscles are present in Iris of the eye, in uterus and bronchi of lungs.
Ans : Smooth or involuntary
Explanation: Smooth (involuntary) muscles are found in the iris, uterus and bronchi. They are not under conscious control and help adjust pupil size, move food and adjust airway diameter automatically.
Q20: A group of cells alike in form, function and origin are called ..........
Ans : Tissue
Explanation: A tissue is a collection of similar cells that perform a common function and have a common origin. Examples include muscle tissue, epithelial tissue and connective tissue.
Q21: Muscles present in our limbs are .......... muscles.
Ans : Skeletal muscles or voluntary muscles
Explanation: Skeletal (voluntary) muscles are attached to bones and are controlled consciously. They enable movements of the limbs like walking, running and lifting objects.
True/False

Q22: A large central vacuole is present in permanent tissues.
Ans: True
Explanation: In many mature plant cells (permanent tissues), a large central vacuole stores water, nutrients and wastes and helps maintain turgor pressure, so the statement is true.
Q23: Cork cells have suberin deposits.
Ans: True
Explanation: Cork cells (phellem) become impregnated with suberin, a waxy substance that makes them waterproof and protective; this helps reduce water loss and protects the plant surface.
Q24: Collenchyma tissue is a strong, flexible, living mechanical tissue.
Ans: True
Explanation: Collenchyma is living tissue with unevenly thickened cell walls; it provides flexible mechanical support to growing stems and leaves, so the statement is true.
Q25: The cytoplasm of a muscle cell is called sarcoplasm.
Ans: True
Explanation: The specialised cytoplasm of muscle cells is called sarcoplasm; it contains stored glycogen and other components needed for muscle activity, so the statement is true.
Q26: Tendons connect muscles to bones.
Ans: True
Explanation: Tendons are strong bands of fibrous connective tissue that attach muscles to bones and transmit the force of muscle contraction to produce movement, so the statement is true.
Matching Questions  

Direction: Each question contains statements given in two columns which have to be matched. Statements (A, B, C, D) in column-I have to be matched with statements (p, q, r, s) in column II.
Q27: 

Ans : (b) A-q, B-r, C-p, D-s
Q28:

Q30:

Ans : (a) A-r, B-s, C-p, D-q