Patterns in Life Diversity and Classification Class 9 MCQ Questions Science Chapter 12

These Class 9 Science MCQ and Class 9 Science Exploration Chapter 12 MCQ Online Test with Answers Patterns in Life Diversity and Classification focus on both theory and practical applications.

Class 9 Science Chapter 12 Patterns in Life Diversity and Classification MCQ

Patterns in Life Diversity and Classification MCQ

Class 9 Science Chapter 12 MCQ Online Test

Question 1.
Which of the following is an endemic species in India?
(a) Red panda
(b) Snow leopard
(c) Nilgiri tahr
(d) Indian elephant
Answer:
(c) Nilgiri tahr

Question 2.
Classification helps scientists to
(a) confuse organisms
(b) organise and study organisms easily
(c) reduce biodiversity
(d) stop evolution
Answer:
(b) organise and study organisms easily

Question 3.
Find out incorrect sentence: (NCERT Exemplar)
(a) Protista includes unicellular eukaryotic organisms
(b) Whittaker considered cell structure, mode and source of nutrition for classifying the organisms in five kingdoms
(c) Both Monera and Protista may be autotrophic and heterotrophic
(d) Monerans have well defined nucleus.
Answer:
(d) Monerans have well defined nucleus.

Question 4.
Rhizobium is important because it
(a) causes disease
(b) fixes nitrogen in soil
(c) produces mushrooms
(d) eats plants
Answer:
(b) fixes nitrogen in soil

Question 5.
Plant cell wall is made of
(a) protein
(b) fat
(c) starch
(d) cellulose
Answer:
(d) cellulose

Question 6.
Pteridophytes differ from bryophytes because they
(a) lack roots
(b) have vascular tissues
(c) are unicellular
(d) live in water only
Answer:
(b) have vascular tissues

Question 7.
Animals are heterotrophic because they
(a) make their own food
(b) depend on other organisms for food
(c) photosynthesise
(d) produce oxygen
Answer:
(b) depend on other organisms for food

Question 8.
Meena and Han observed an animal in their garden. Hari called it an insect while Meena said it was an earthworm. Choose the character from the following which confirms that it is an insect. (NCERT Exemplar)
(a) Bilateral symmetrical body
(b) Body with jointed legs
(c) Cylindrical body
(d) Body with little segmentation
Answer:
(b) Body with jointed legs

Question 9.
A notochord is
(a) a rod-like supporting structure
(b) a type of leaf
(c) aflowerpart
(d) a seed coat
Answer:
(a) a rod-like supporting structure

Question 10.
Loss of biodiversity is mainly caused by
(a) planting trees
(b) rainfall
(c) photosynthesis
(d) pollution and deforestation
Answer:
(d) pollution and deforestation

Question 11.
A researcher finds organisms that are unicellular, have a nucleus, and live in water. Some are autotrophic while others are heterotrophic. Which kingdom do they belong to?
(a) Monera
(b) Fungi
(c) Plantae
(d) Protista
Answer:
(d) Protista

Question 12.
Which of the following is the feature of the group to which Spirogyra belongs?
(a) The body has segments
(b) The plant body is not differentiated into root, stem and leaves
(c) The plant does not have chlorophyll
(d) None of these.
Answer:
(b) The plant body is not differentiated into root, stem and leaves

Question 13.
Plants growing in cold and dry regions often have needle-like leaves and exposed seeds. This feature indicates adaptation to
(a) aquatic conditions
(b) absence of reproduction
(c) gymnosperm characteristics
(d) angiosperm characteristics.
Answer:
(c) gymnosperm characteristics

Question 14.
Identify the structure X and Y in the given figure

(a) X- xylem, Y-phloem
(b) X- phloem, Y- xylem
(c) X- cortex, Y- epidermis
(d) X- endodermis, Y- pericycle
Answer:
(b) X- phloem, Y- xylem

Question 15.
A botanist observes two plants: one has no true roots or stems and lives in water, while the other has root-like structures and grows on moist land. Which conclusion is correct?
(a) both belong to same group
(b) first is Thallophyta, second is Bryophyta
(c) both are angiosperms
(d) both have vascular tissues
Answer:
(b) first is Thallophyta, second is Bryophyta

Question 16.
Which of the following have a vertebral column?
(i) Mammals
(ii) Mollusca
(iii) Annelida
(iv) Birds
(a) (i) and (ii) only
(b) (ii) and (iii) only
(c) (i) and (iv) only
(d) (iii) and (iv) only
Answer:
(c) (i) and (iv) only

Question 17.
A flat-bodied organism shows bilateral symmetry and moves in a definite direction but lacks a separate anus. Select the correct classification.
(a) Platyhelminthes
(b) Nematoda
(c) Annelida
(d) Mollusca
Answer:
(a) Platyhelminthes

Patterns in Life Diversity and Classification Class 9 Assertion and Reason Questions

Direction (Q. No. 1 to 11): The question below consists of an Assertion (A) and a Reason (R). Use the following key to choose the appropriate
answer.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.

Question 1.
Assertion (A): Biodiversity is important for ecosystem stability.
Reason (R): Different organisms perform interconnected roles in nature.
Answer:
(a) Both A and R are true, and R is the correct explanation of A.

Question 2.
Assertion (A): All unicellular organisms belong to Monera.
Reason (R): Some unicellular organisms are eukaryotic.
Answer:
(d) A is false but R is true.

Question 3.
Assertion (A): Vertebrates have a backbone.
Reason (R): Backbone supports the body and protects vital organs.
Answer:
(a) Both A and R are true, and R is the correct explanation of A.

Question 4.
Assertion (A): Fossils help us understand evolution.
Reason (R): They show preserved remains of ancient organisms.
Answer:
(a) Both A and R are true, and R is the correct explanation of A.

Question 5.
Assertion (A): Classification helps in studying organisms easily.
Reason (R): Classification is based on the colour of organisms only.
Answer:
(c) A is true but R is false.

Question 6.
Assertion (A): Presence or absence of a nucleus is used to classify organisms.
Reason (R): Organisms are divided into prokaryotes and eukaryotes based on cell structure.
Answer:
(a) Both A and R are true, and R is the correct explanation of A.

Question 7.
Assertion (A): Animals are multicellular, heterotrophic organisms without cell walls.
Reason (R): Animals are classified based on body design and level of organisation.
Answer:
(b) Both A and R are true, but R is not the correct explanation of A.

Question 8.
Assertion (A): Classification helps in identifying and naming organisms.
Reason (R): It is used only for studying plants.
Answer:
(c) A is true but R is false.

Question 9.
Assertion (A): Biodiversity includes a large variety of living organisms in different habitats.
Reason (R): Organisms are found only in forests.
Answer:
(c) A is true but R is false.

Question 10.
Assertion (A): Fungi help in recycling nutrients in nature.
Reason (R): Fungi are autotrophic organisms that prepare their own food.
Answer:
(c) A is true but R is false.

Question 11.
Assertion (A): Pteridophytes have vascular tissues.
Reason (R): Xylem and phloem transport water and food in plants.
Answer:
(a) Both A and R are true, and R is the correct explanation of A.

Patterns in Life Diversity and Classification Class 9 Fill in the Blanks

1. Regions that support a large number of …………………….. species are known as biodiversity hotspots.
Answer:
Endemic

2. Five kingdom classification of living organisms is given by ………………………….. . (NCERT Exemplar)
Answer:
Robert Whittaker

3. The five kingdom classification is based on features like cell type and ………………………….. of nutrition.
Answer:
mode

4. Some bacteria that cause diseases are called ………………………. .
Answer:
pathogens

5. Cell wall of fungi is made up of ………………………. . (NCERT Exemplar)
Answer:
chitin

6. Plants without well-differentiated stem, root and leaf are kept in ……………………. .
Answer:
thallophyta

7. The cell wall of plants is mainly made of …………………….. .
Answer:
cellulose

8. Algae and fungi form symbiotic association called …………………………… . (NCERT Exemplar)
Answer:
Lichen

9. Binomial nomenclature was introduced by ……………………… .
Answer:
Carolus Linnaeus

10. ……………………………………… act as natural records of the past.
Answer:
Fossils

Patterns in Life Diversity and Classification Class 9 True or False

1. Biodiversity refers to the variety of non-living things only.
Answer:
False

2. All prokaryotes are classified under Monera. (NCERT Exemplar)
Answer:
True

3. Classification makes the study of organisms more difficult.
Answer:
False

4. Bryophytes have conducting tissue. (NCERT Exemplar)
Answer:
False

5. Fungi prepare their own food by photosynthesis.
Answer:
False

6. Gymnosperms differ from Angiosperms in having covered seed. (NCERT Exemplar)
Answer:
False

7. Flatworms show bilateral symmetry.
Answer:
True

8. Species is the broadest category in classification.
Answer:
False

9. Scientific names consist of two parts.
Answer:
True

10. Starting from Class, Species comes before the Genus. (NCERT Exemplar)
Answer:
False

Patterns in Life Diversity and Classification Class 9 Match the Following

Question 1.
Match Column A with Column B.

Column A	Column B
(i) Monera	(a) Multicellular autotroph
(ii) Protista	(b) Prokaryotic organisms
(iii) Fungi	(c) Unicellular eukaryotes
(iv) Plantae	(d) Chitin cell wall

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

Column A	Column B
(i) Monera	(b) Prokaryotic organisms
(ii) Protista	(c) Unicellular eukaryotes
(iii) Fungi	(d) Chitin cell wall
(iv) Plantae	(a) Multicellular autotroph

Question 2.
Match Column A with Column B.

Column A	Column B
(i) Porifera	(a) Jointed legs
(ii) Arthropoda	(b) Pore-bearing animals
(iii) Annelida	(c) Segmented body
(iv) Mollusca	(d) Soft body

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

Column A	Column B
(i) Porifera	(b) Pore-bearing animals
(ii) Arthropoda	(a) Jointed legs
(iii) Annelida	(c) Segmented body
(iv) Mollusca	(d) Soft body

Question 3.
Match column I with column II and select the correct option.

Column I	Column II
(p) Algae	(i) Autotrophs
(q) Fungi	(ii) Pollination
(r) Bees	(iii) Decomposition
(s) Cyanobacteria	(iv) Oxygen production

(a) (p) – (i), (q) – (ii), (r) – (iii), (s) – (iv)
(b) (p) – (ii), (q) – (i), (r) – (iv), (s) – (iii)
(c) (p) – (iii), (q) – (iv), (r) – (i), (s) – (ii)
(d) (p) – (iv), (q) – (iii), (r) – (ii), (s) – (i)
Answer:
(d) (p) – (iv), (q) – (iii), (r) – (ii), (s) – (i)

Column I	Column II
(p) Algae	(iv) Oxygen production
(q) Fungi	(iii) Decomposition
(r) Bees	(ii) Pollination
(s) Cyanobacteria	(i) Autotrophs

Question 4.
Match Column I with Column II and select the correct option.

Column I	Column II
(p) Carolus Linnaeus	(i) Five Kingdom system
(q) Ernst Haeckel	(ii) Four Kingdom system
(r) Herbert F. Copeland	(iii) Three Kingdom system
(s) Robert H. Whittaker	(iv) Two Kingdom system

(a) (p) -(iv), (q) – (iii), (r) – (ii), (s) – (i)
(b) (p) – (ii), (q) – (i), (r) – (iv), (s) – (iii)
(c) (p) – (iii), (q) – (iv), (r) – (i), (s) – (ii)
(d) (p) – (i), (q) – (iii), (r) – (ii), (s) – (iv)
Answer:
(a) (p) -(iv), (q) – (iii), (r) – (ii), (s) – (i)

Column I	Column II
(p) Carolus Linnaeus	(iv) Two Kingdom system
(q) Ernst Haeckel	(iii) Three Kingdom system
(r) Herbert F. Copeland	(ii) Four Kingdom system
(s) Robert H. Whittaker	(i) Five Kingdom system

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