CBSE 9th Biology | Organization in the Living World- Practice Questions

Organization in the Living World- Practice Questions

Fill in the Blanks

1……………………. tissues are regions where cells have lost their ability to divide.

2. Elongated cells with thickenings at corners constitute

3. Tracheids and vessels are the main elements in the xylem.

4. Lining of alveoli and blood capillaries is formed by epithelium.

5…………………….. connect bones to bones.

6. The………………. meristem is located at the tips of the root stem or branch.

7. The dense connective tissues that connect muscle to bone are called

8. Permanent tissues are derived from……. tissue once they lose the ability to divide.

9. Nervous tissue is made of….. that receive and conduct impulses.

10. Xylem and phloem are types of… tissues.

True False

11. Connective tissue functions in binding and supporting animal tissues.

12. Histology is the study of cells and tissues.

13. Adipose tissue is a type of connective tissue.

14. Blood is a type of connective tissue.

15. Voluntary muscles do not get tired on sustained use.

16. Striated, unstriated and cardiac are three types of muscle tissues.

17. Schwann cells insulate nerve fibers within the nervous system.

18. Xylem and phloem are specialized conductive tissues that transport materials through the plant.

19. The palisade layer of the leaf is composed of photosynthetic parenchyma cells.

20. The cells that make up the meristematic region of a plant are specialized and differentiated.

Match Column

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.

Question 21. Match the tissue types with their functions

                          Column I                                   Column II

(A)   Dermal tissue               (p) Adds new cells through growth

(B)   Meristematic                (q) Conduct water and tissue dissolved nutrients

(C)   Ground tissue               (r) covers, protects plant; regulates gas exchange

(D)Vascular tissues              (s) Makes up bulk of plant; stores nutrients; photosynthesizes

Question 22. Match the connective tissue type with its location in the body.

                        Column I                                      Column II

(A) Loose connective                            (p) Ears and joints

(B) Dense connective                           (q) Circulatory system

(C) Blood                                             (r) Under skin

(D) Cartilage                                        (s) Ligaments and tendons

Question 23.

                        Column I                                      Column II
(Contraction speed)                              (Muscle
)

(A) Fast                                          (p) Cardiac

(B) Moderate                                   (q) Smooth

(C) Slow                                          (r) Skeletal

Question 24.

                          Column I                                  Column II

                            (Cell)                                      (Function)

(A) Parenchyma                              (p) water transport

(B) Sclerenchyma                           (q) water and nutrient support

(C) Tracheids                                  (r) Storage, division

Multiple Choice Questions

Questionn 25. Simple tissues are

(a) Parenchyma, xylem and collenchyma

(b) Parenchyma, collenchyma and sclerenchyma

(c) Parenchyma, xylem and sclerenchyma

(d) Parenchyma, xylem and phloem

Question 26. The living cells providing tensile strength are

(a) Parenchyma

(b) Collenchyma

(c) Sclerenchyma

(d) Sclerotic cells

Question 27. Quiescent centre is found in

(a) Root tip

(b) Cambium

(c) Shoot tip

(d) Leaf tip

Question 28. The conducting cells of xylem are

(a) Tracheary elements

(b) Sieve elements

(c) Companion cells

(d)  All the above

Question 29. The chief function of vessels in the plant body is

(a) to translocate food material

(b) to conduct water and mineral salts

(c) to support living cells

(d) all the above

Question 30. Inner surface of fallopian tubes, bronchi and bronchioles are lined by

(a) Squamous epithelium

(b) Ciliated epithelium

(c) Columnar epithelium

(d) Cubical epithelium

Question 31. Average life span of human R.B.C. is

(a) 100 days

(b) 90 days

(c) 120 days

(d).None

Question 32. Which set clearly identify striated muscles

(a) Cylindrical, syncytial and unbranched

(b) Spindle, unbranched and uninucleated

(c) Cylindrical, striped and nucleated

(d) Cylindrical, striped and branched

Question 33. Cardiac muscle cells are cylindrical branched

(a) Uninucleate and voluntary

(b) Uninucleate and involuntary

(c) Multinucleate and voluntary

(d) Multinucleate and involuntary

Question 34. The fibrous tissue which connects the two bone is

(a) Connective tissue

(b) Tendon

(c) Ligament

(d) Adipose tissue

Question 35. Largest number of cell bodies of neuron in our body are found in

(a) Retina

(b) Spinal cord

(c) Brain

(d) Tongue

Question 36. Neurons are classified on the basis of

(a) Number of nucleus present

(b) Number of processes arising from the cell body

(c) Number of dendrites present

(d) Number of axons present

Question 37. Tissues that have long and narrow cells are called

(a) Cuboidal epithelium

(b) Squamous epithelium

(c) Germinal epithelium

(d) Columnar epithelium

Question 38. The vascular tissues of the plant function in

(a) Support

(b) Support and transport of materials

(c) Secretion of plant hormones

(d) All of the above

Question 39. Which tissue lacks blood supply and heals slowly

(a) Nervous

(b) Muscle

(c) Cartilage

(d) Bone

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CBSE 9th Biology | Organization in the Living World-Conceptual Questions

Organization in the Living World-Conceptual Questions with Answers

Question 1. In Arctic area where temperature is recorded in minus degrees and land is frozen we can see polar bears. What made their survival possible in such conditions?

Answer.

In animals, fat storing adipose tissue is found below the skin and between internal organs. The cells are filled with fat globules.

This fat layer acts as an insulator. Polar bears are equipped for survival in arctic area due to presence of 2 coats of insulating fur and a very thick layer of body fat. This thick fat layer protects the animal from outside cold.

Question 2. Although a layer of fat is present below the skin in all animals, man needs to wear woolen clothes in winter but cows and buffaloes don’t. Why?

Answer.

A layer of body fat is present in man as well as in cows and buffaloes. But this layer is very thin in man and is not sufficient to protect from outside .cold, however it is thick enough to protect cows and buffaloes from cold.

Question 3. An accident case with brain injury is considered more critical than an accident case with fractured arm. Why?

Answer.

All the cells of our body except nerve cells or neurons have power of regeneration and healing. Cells of arms regenerate and repair and wound heals after sometime. But nerve cells or neurons lacks the power of regeneration. They can’t be repaired after a wound. Therefore, any injury to the brain cells could lead to any permanent disorder of brain.

Question 4. Study of muscles fibers show abundant mitochondria in their cells as compared to other tissues. Give reason.

Answer.

Muscles help in the movement of our body. For this they require a lot of energy. To fulfill this energy requirement, they have mitochondria in abundance in their cells as mitochondria produces energy rich compound ATP (Adenosine triphosphate) by respiration.

Question 5. Why blood is called ‘fluid connective tissue ?

Answer.

Blood is called fluid connective tissue because it has liquid matrix plasma in which blood cells keep on floating. It circulates or flows in the body to transport oxygen, food, hormones and waste materials to the organs where they are required. Thus blood remains in contact with all organs of the body.

6. Match the following:

                        A                                                                     B
                    (i) Jute                                                             (a) Cutin
                    (ii) Bottle cork                                                   (b) Lignin
                    (iii) Cuticle                                                        (c) Suberin
                    (iv) Pear                                                           (d) Sclereids

Answer.

(i) – (b),     (ii) – (c),     (iii) – (a),        (iv) – (d).

Question 7. Though plant are exposed to Sun throughout the day. But they don’t burn. Explain.

Answer.

Presence of enough water is necessary in plants to prevent them from burning in sun. Transpiration play an important role in absorbing water by plants. Transpiration is loss of water in the form of vapour from aerial parts of the plants through stomata. This loss of water creates a pressure in roots to absorb more water from the soil. Thus transpiration helps the plants in retaining enough water. Also transpiration causes cooling of plant surface and don’t let them burn.

Question 8. We feel pain when our finger is cut but we don’t feel pain on cutting nails. Give reason.

Answer.

Nails are a type of modified skin. Nails are formed by keratinization. keratinization is the process by which cells becomes horny due to deposition of a protein called keratin. Nail cells are dead so we don’t feel pain on cutting them while finger cells are living.

Question 9. Xylem is poorly developed or absent in water plants or hydrophytes. Explain.

Answer.

Xylem is a vascular tissue that helps in conduction of water in plants from roots to the leaves. But hydrophytes are water plants and their whole body remain in water. So, water simply diffuses in through general body surface of the plants. Hence, xylem is absent in hydrophytes.

Question 10. What kind of sclerenchymatous cells are found in Jute and Pear.

Answer.

Jute – Fibres

Pear – Sclereids

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