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True

The animals belonging to Phylum nematoda contains only the tissues and no real organs. The tissues behave as organs which perform different functions like excretion, respiration, nutrition, etc.

Gymnosperms are mostly evergreen, perennial and woody.

False 

Angiosperms do not bear naked seeds instead angiosperms bear covered seeds (seeds enclosed in flower and then in the fruit) whereas naked seed is the property of plants belonging to division gymnospermae.

Nematodes are pseudocoelomate. The others are not nematodes and hence are not pseudocoelomate.

Jointed appendages are the characteristic feature of the members of Phylum Arthropoda. Arthro =jointed; poda=legs. All the members of Phylum Arthropoda have jointed appendages.

Sea cucumber or holothuria belongs to phylum Echinodermata. For locomotion, sea cucumbers use tube feet , which are small sucker like projections present on the three ambulacral canals on the surface close to the substratum. These are numerous and allow the animal to crawl .

The plants belonging to this group are commonly called Algae. Examples are Spirogyra, Cladaphora, Ulothrix, Chara

Four general characters of Thallophyta are 

• They are aquatic. 

• They are autotrophic 

• They consist of a cellulose cell wall around their cells. 

• Mechanical and conducting elements are absent in Thallophyta.

Thallophyta are the simplest of plants that do not have a well-differentiated body design. The plants in this group are commonly called algae. These are predominantly aquatic. 

Ex: Spirogyra, Ulothrix, Cladospora and Chara

The phylum Porifera got its name from the word 'pores'. The body of all the members of Porifera is porous. The important characteristic of this phylum is the presence of different types of canal systems which help in nutrition, reproduction, and excretion.

True

Gymnosperms are the tall trees having well developed tissues for the conduction of water, minerals and food. Because of this ability they are usually perennial, evergreen and woody.

True

Platyhelminthes or flatworms are usually parasitic in nature but they can also be free living.

Free living flatworm: turbellaria

Parasitic flatworm: liver fluke, tapeworm

Nereis of phylum Annelida has parapodia for locomotion.

Importance of classification: 

• Classification helps to understand evolution, as both are closely related. 
• Classification helps to know the relationship between different plants/organisms, as organisms are put together on the basis of similarities.

Important phylum of plant kingdom:

• Thallophyta 
• Bryophyta 
• Pteridophyta 
• Gymnosperm 
• Angiosperm

Animals belonging to the following phylums 

(a) Porifera – Sycon, Spongilla 

(b) Ceolenterata – hydra, sea anemone 

(c) Annelida – earthworm, leeches 

(d) Mollusc - octopus, pila

Gymnosperms have naked seeds while the seeds in angiosperms are enclosed in a lower. Hence, they are grouped separately. 

Examples: woody shrubs and trees include pines, spruces, firs, and ginkgoes.

Sea cucumber is a coelentrata. It has a very basic structural organisation as compared to Mollusca, echinoderms and protochordate.

Nematodes are first animals to have complete alimentary canal. 

1. They are pseudo coelomate. 

2. They are cylindrical in body structure

(A). Division Thallophyta 

• The plant body is thalloid are not divided into true root, stem or leaves  
• Conducting elements are absent in thallophytes 

(B) Division Pteridophyta 

• Pteridophyta are first true land plants 
• They are seedless, vascular cryptogams 

(C) Division gymnosperms 

• They have naked seeds, that is, its seeds are not covered by fruit. Formation of the flower is absent. 
• The seeds are pollinated by wind 

(D) Phylum Coelenterata 

• Presence of cnidoblast cells, therefore, phylum also known as cnidaria 
• All the members of phylum Coelenterata are aquatic, mostly marine. 

(E) phylum Annelida 

• Body is metamerically segmented 
• First Phylum having a true coelom 

(F) phylum Arthropoda  

• Animals having jointed appendages 
• Largest and most successful phylum on the Earth 

(G) subphylum protochordate 

• Pharynx perforated by Gill slits. 
• A post-anal tail is present. Brainbox is absent.

(H) subphylum Vertebrata 

• The notochord is replaced by a cartilaginous or bony vertebral column in the adult 
• Presence of dorsal hollow nerve cord

True

Cotyledons are a part of seed which represent a bit of pre-designed plant in the seed. On the basis of number of cotyledons present in the seed, the plant can be categorised as monocot or dicot.

Main features of phylum coelenterate are as follows:

(a) The animals belonging to phylum coelenterate live in water. 

(b) They show more body differentiation. A body Cavity is present. 

(c) Body is made up of two layers of cells; one makes up cells on the outside of the body, other makes up the inner lining of the body 

(d) Some species live in colonies (coral), while some follow solitary life span (hydra)

Lowest structural organisation is seen in phylum Porifera. Its features are: 

1. They are marine nonmotile animals. 

2. They have minimal differentiation of body design. 

3. The outer skeleton is hard.

4. Canal system is present for the exchange of food and oxygen.

5. They have pores all over the body.

Sponge is the simplest animal of the given because it has the minimally differentiated body design.

(a) positive

Chiton and Pila belong to Mollusca phylum. It’s features are :

1. Reduced coelomic cavity. 

2. Little segmentation. 

3. Kidney like organ for excretion 

4. Open circulatory system 

5. Foot like appendage for movement.

Seed leaves are called cotyledons in scientific terms.

Correct answer is (b) Wrap through

No, feather star is an echinoderm, because it has a slender skinned body, and is exclusively marine. It also has a water driven tube system to help in moving around.

Correct answer is (c) Ctrl + M

Correct answer is (a) Ctrl + A

Scientific name provides the genus and species name of an organism, thus indicating the group in which the organism belongs . It also helps in grouping organisms of same category together, thus helping in classification.

Annelida 

The animals belonging to this group show segments on the body. They are found in a variety of habitats such as fresh water, marine water and land.

The differences between the members of Annelida and arthropods are:

1. The name of genus should start with a capital letter and that of species with a small letter.

2. When printed, the scientific name should be in italics.

Correct answer is (b) Tools → AutoCorrect

Correct answer is (a) Ctrl + F

(c) Ctrl + Shift + P

Correct answer is (a) Ctrl + F

Correct answer is (b) footer

Correct answer is (c) Ctrl + Z

Out of the above mentioned four, urchins are not the members of phylum Annelida; instead, they are the members of class Echinoidea, phylum Echinodermata. They are usually small, round and spiny in nature.

Carolus Linnaeus proposed binomial nomenclature

Class 9 Science MCQ Questions of Diversity in Living Organism with answers accessible.  Multiple Choice Questions structure a significant part of board and NEET Exams and whenever practiced appropriately can assist you with getting a higher position.  

The MCQ Questions for class 9 science with answers have been set up according to the syllabus and exam pattern. MCQ Questions can be of assistance as you will know about every one of the ideas and concepts. These MCQ Questions of Diversity in Living Organism with answers clear for a fast revision of the Chapter.

Practice MCQ Questions for class 9 Chapter-Wise

1. Which among the following produce seeds?

(a) Thallophyta
(b) Bryophyta
(c) Pteridophyta
(d) Gymnosperms 

2. Which one is a true fish?

(a) Jellyfish
(b) Starfish
(c) Dogfish
(d) Silverfish

3. Elephantiasis is caused by

(a) Wuchereria
(b) Pinworm
(c) Planarians
(d) Liver flukes

4. Pteridophyta do not have

(a) root
(b) stem
(c) flowers
(d) leaves

5. The feature that is not a characteristic of protochordata?

(a) Presence of notochord
(b) Bilateral symmetry and coelom
(c) Jointed legs
(d) Presence of circulatory system

6. Real organs are absent in

(a) Mollusca
(b) Coelenterata
(c) Arthropoda
(d) Echinodermata

7. Hard calcium carbonate structures are used as skeletons by

(a) Echinodermata
(b) Protochordata
(c) Arthropoda
(d) Nematoda

8. What is the phylum of Octopus?

(a) Arthropoda
(b) Mollusca
(c) Annelida
(d) cnidarian

9. Most paramecium move with the help of......

(a) Villi
(b) Oral grove
(c) Cilia
(d) Stationary
(e) None of the above

10. Sound producing organ in birds is:-

(a) Trachea
(b) Pneumatic bones
(c) Syrinx
(d) Plumage

11. Earthworm has an unsegmented band called :

(a) Clitellum
(b) Cephalothorax
(c) Thorax
(d) Metathorax

12. How many germ layers are present in the embryo of a highly advanced animal?

(a) 1
(b) 2
(c) 4
(d) 3

13. Fungus which uses decayed material as a food called……………

(a) Saprotrophs
(b) Autotrophic
(c) Heterotrophic
(d) None of them.

14. Worms causing elephantiasis

(a) Bacteria
(b) Virus
(c) Filarial worms
(d) Pinworms

15. In which class birds are included?

(a) Amphibia
(b) Pisces
(c) Reptilia
(d) Aves

16.  Which among the following is a common feature of chrodates?

(a) Presence of notochord
(b) Presence of triploblastic condition
(c) Presence of coelom
(d) Presence of gill pouches

17. The correct order of the biological hierarchy from Kingdom to Species is

(a) Kingdom, Phylum, Order, Family, Class, Genus, Species
(b) Kingdom, Phylum, Class, Order, Family, Genus, Species
(c) Kingdom, Class, Family, Order, Phylum, Genus, Species​
(d) Kingdom, Class, Order, Phylum, Family, Genus, Species 

18. Herdmania is the example of………………….

(a) Echinodermata
(b) Protochordata
(c) Arthropoda
(d) Tiploblast 

19. The spiny skinned organisms belong to phylum...

(a) echinodermata
(b) Porifera
(c) Arthropoda
(d) Aves 

20. The presence of hollow and light bones is a characteristic feature of class ……………

(a) Aves
(b) Porifera
(c) Arthropoda
(d) echinodermata

Answer:

1. Answer : (d) Gymnosperms

Explanation: In the case of phanerogams (seeds bearing plants), i.e., the gymnosperms and angiosperms, seeds are produced after fertilisation. They contain embryo along with stored food. The stored food provides nourishment to the developing embryo.

2. Answer : (c) Dogfish

Explanation: Dogfish is referred to as true fish, amongst Dogfish, Jellyfish, Starfish, and Silverfish. Jellyfish is not listed as a fish as it does not meet the characteristics of being a fish. Recall that, A fish should have gills, fins, and a vertebra which is all lacking in a jellyfish.

3. Answer :  (a) Wuchereria

Explanation: Elephantiasis is caused by parasitic worms that are spread by mosquitoes. There are three types of worms involved: Wuchereria bancrofti. Brugia malayi.

4. Answer :  (c) flowers

Explanation: Pteridophytes do not have seeds or flowers either, instead they also reproduce via spores.

5. Answer : (c) Jointed legs

Explanation: The feature that is not a characteristic of protochordata is jointed legs and presence of a closed circulatory system. Jointed legs are found in arthropods and surely it is not found in protochordata.

6. Answer :  (b) Coelenterata

Explanation: Coelentrates are multicellular, diploblastic, and acoelomate animals having tissue level of organization i.e., they lack true organs, mollusca, Arthropoda and Echinodermata have organ level of organization.

7. Answer :  (a) Echinodermata

Explanation: Body wall of echinodermata is covered with spiny, hard, calcareous (calcium carbonate) plates (ossicles) that form a rigid or flexible endoskeleton.

8. Answer :  (b) Mollusca

Explanation: Mollusca is one of the most diverse groups of animals on the planet, with at least 50,000 living species (and more likely around 200,000). It includes such familiar organisms as snails, octopuses, squid, clams, scallops, oysters, and chitons.

9. Answer :  (c) Cilia

Explanation: Cilia are essential for the movement of paramecia. As these structures whip back and forth in an aquatic environment, they propel the organism through its surroundings.

10. Answer :  (c) Syrinx

Explanation: At the point where the windpipe divides is situated the bird's sound-producing organ, a “voice box” called the syrinx. Humans have no syrinx but a larynx instead. The larynx is a cavity in the throat and contains our vocal cords.

11. Answer :  (a) Clitellum

Explanation: A conspicuous dark band of glandular tissue termed clitellum covers segments in a mature worm. So, the earthworm has an unsegmented band in its body called clitellum.

12. Answer : (d) 3

Explanation: Appropriate organization of three germ layers—endoderm, mesoderm, and ectoderm—during gastrulation is essential for a developing embryo.

13.Answer :  (a) Saprotrophs

Explanation: Saprotroph, also called saprophyte or saprobe, organism that feeds on nonliving organic matter known as detritus at a microscopic level.

14. Answer : (c) Filarial worms

Explanation: Lymphatic filariasis, commonly known as elephantiasis, is a painful and profoundly disfiguring disease. It is caused by infection with parasites classified as nematodes (roundworms) of the family Filariodidea that are transmitted through the bites of infected mosquitos.

15.Answer : (d) Aves

Explanation:  Bird, (class Aves), any of the more than 10,400 living species unique in having feathers, the major characteristic that distinguishes them from all other animals.

16. Answer :  (a) Presence of notochord

Explanation: In chordates, four common features appear at some point during development: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.

17. Answer :  (b) Kingdom, Phylum, Class, Order, Family, Genus, Species

Explanation: The current taxonomic system now has eight levels in its hierarchy, from lowest to highest, they are: species, genus, family, order, class, phylum, kingdom, domain.

18. Answer :  (b) Protochordata

Explanation: Herdmania is a genus of ascidian tunicates in the family of Pyuridae.These are marine animals having few features of vertebrates.

19. Answer : (a) echinodermata

Explanation: Echinoderms are "spiny-skinned" invertebrate animals that live only in marine environments.

20. Answer :  (a) Aves

Explanation:  Aves are the class of vertebrates that are characterised by the presence of feathers and wings. All birds fall under this class. They have long hollow bones that help them to fly. The forelimbs are modified for flight.

Click here to practice MCQ Questions of Diversity in living organisms class 9

(i) Presence of membrane bound organelles, including a nucleus. This helps the organism organise specialised functions. 

Organisms without demarcated organelles will have biochemical pathway organised in different ways, which would further have an effect on every aspect of cell design. 

(ii) Whether cells occur singly, or grouped together or do they live as an Indivisible group 

Cells which are grouped together to form a single organism use the principle of division of labour. In such an animal, all cells would not be identical, but a group of cells will carry out specialized function. 

(iii) Does the organism produce own food through photosynthesis 

(iv) The level of organization of body of organisms who perform photosynthesis 

(v) Of the animals, how does the individual's body develop and organizers different parts, and what are the specialized organs found for different functions.

The ruler is a scale below the formatting toolbar which shows the margins. 

There are two set of rulers

1. Horizontal ruler and

2. Vertical ruler. Horizontal rules is used to set left and right margins of a page and vertical ruler for top and button setting.

When the text reaches the end of the line, the word is automatically wrapped to the next line. This feature in any word processor is known as “Word Wrap”.

Animals have four limbs for locomotion and hence the name tetrapoda. 

Tetrapoda is divided into four classes:

1. Amphibia, 

2. Reptilia, 

3. Aves and 

4. Mammalia.

1.  Amphibia

These animals are adapted to live both in water and land. Mucus glands on skin keep the skin moist. The animals breathe through skin when in water and through lungs when on land. The heart has three chambers. These are cold-blooded animals. 

Examples: Frog, toad, salamander, etc.

2. Reptilia

These animals show crawling movement for locomotion. Skin is hardened to form scales. Most of the reptilians have three-chambered heart but crocodile has four-chambered heart. They don’t need water to lay eggs, rather eggs are covered with hard shells and laid on land. 

Examples: snakes, lizards, crocodile, turtle, etc.

3. Aves

The body is covered with feathers. Forelimbs are modified into wings. These are warmblooded animals. The heart has four chambers. Bones are hollow (pneumatic); which assists in flying. All the birds belong to this class.

4. Mammalia.

The body is covered with hairs. Skin has seat glands and sebaceous glands. Mammary glands are present in females and are used for nourishing the young ones. Most of the mammalians give birth to young ones and are called viviparous. Some of the mammals lay eggs and are called oviparous. 

Examples: human, chimpanzee, lion, platypus, horse, etc.

Organisation of nucleus is the primary characteristic on which the first division of organisms is made. Based on this, organisms can be either prokaryotic or eukaryotic.

(a) Ctrl + Alt + C

(d) Ctrl + F12

Correct answer is (a) F1