Diversity in the Living World NEET Biology MCQ

Diversity in the Living World NEET Biology MCQ 2023 With millions of different species of plants, animals, and microorganisms, the living world is extremely diverse. Our planet’s health and our own survival depend on this diversity.

There are various degrees of variety in the living scene. Genetic diversity, or the variation in genes within a species, is one level. Species are able to adjust to new environments and conditions thanks to their diversity. For instance, a few populaces of the peppered moth developed to have a more obscure tinge because of air contamination. They were more likely to survive and reproduce as a result of this adaptation, which made it easier for them to hide from predators.

The number of distinct species found on Earth is referred to as species diversity, which is another level of diversity. There are an expected 1.7 million known species, yet researchers accept that there might be upwards of 100 million species that poor person yet to be found. Species variety is significant in light of the fact that it permits various species to collaborate with one another in complex ways. For instance, plants and creatures rely upon one another for food and asylum. At the point when one animal category vanishes, it can significantly affect different species in the biological system.

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Diversity in the Living World NEET Biology MCQ 2023

1. Who was the founder of the five-kingdom system of classification?

1.  C. Linnaeus
2. R.H. Whittaker
3. Aristotle
4. T.O. Diener

Answer:

• R.H. Whittaker

R.H. Whittaker proposed five kingdom classification (1969)

2. According to five kingdom system, gymnosperms and angiosperms are grouped under the kingdom

1. Monera
2. Protista
3. Fungi
4. Plantae

Answer:

• Plantae

Gymnosperm and Angiosperm – Kingdom-Plantae

3. Which organisms are not included in the five-kingdom system of classification?

1. Protozoans
2. Viruses
3. Lichens
4. Both (2) & (3)

Answer:

• Both (2) & (3)

NCERT Class 11th Page No.25 ( 2.6 1st line of Paragraph )

4. Heterotrophic, eukaryotic, multicellular organisms lacking a cell wall are included in the kingdom.

1. Protista
2. Fungi
3. Plantae
4. Animalia

Answer:

• Animalia

Animalia includes heterotrophic, eukaryotic, multicellular organisms lacking a cell wall

5. Select the correct statement.

1. Cholera, typhoid, tetanus are well-known diseases caused by viruses
2. Dinoflagellates, euglenoids and slime moulds are placed under kingdom Monera
3. Members of kingdom Protista are primarily aquatic
4. Dinoflagellates are the chief ‘producers’ in the oceans

Answer:

• Members of the kingdom Protista are primarily aquatic

Cholera, Typhoid, Tetanus – Bacterial diseases

Dinoflagellates, Euglenoids & Slime moulds – Protista

Diatoms are the chief producers of the ocean.

6. Select the incorrect statement.

1. Nostoc and Anabaena have heterocysts for nitrogen fixation
2. Cyanobacteria often form blooms in polluted water bodies
3. Heterotrophic bacteria are more abundant in nature
4. The cell wall of Mycoplasma are made up of chitin

Answer:

• The cell wall of Mycoplasma are made up of chitin

The cell wall is absent in Mycoplasma.

7. Conifers are adapted to tolerate extreme environmental conditions because of

1. Broad hardy leaves
2. Superficial stomata
3. Thick cuticle
4. Presence of vessels

Answer:

• Thick cuticle

In conifers, the needle like leaves, thick cuticle and sunken stomata help to reduce water loss.

8. Select the correct statement

1. The leaves of gymnosperms are not well adapted to extremes of climate
2. Gymnosperms are both homosporous and heterosporous
3. Salvinia, Ginkgo and Pinus all are gymnosperms
4. Sequoia is one of the tallest trees

Answer:

• Sequoia is one of the tallest trees

9. Which one is a wrong statement?

1. Brown algae have chlorophyll a and c, and fucoxanthin
2. Archegonia are found in Bryophyta, Pteridophyta and Gymnosperms
3. Mucor has biflagellate zoospores
4. The haploid endosperm is a typical feature of gymnosperms

Answer:

• Mucor has biflagellate zoospores

Mucor has non-motile spores i.e. sporangiospores.

10. Body having meshwork of cells, internal cavities lined with food-filtering flagellated cells and indirect development are the characteristics of phylum:

1. Protozoa
2. Coelenterata
3. Porifera
4. Mollusca

Answer:

• Porifera

In poriferans, the body is a loose aggregate of cells (meshwork of cells). Internal cavities and canals are lined with food-filtering flagellated cells i.e. choanocyte/collar cells. Choanocytes help in filter feeding.

11. Which of the following characteristics is mainly responsible for the diversification of insects on land?

1. Eyes
2. Segmentation
3. Bilateral symmetry
4. Exoskeleton

Answer:

• Exoskeleton

12. Which of the following endoparasites of humans show viviparity?

1. Ascaris lumbricoides
2. Ancylostoma duodenale
3. Enterobius vermicularis
4. Trichinella spiralis

Answer:

• Trichinella spiralis

13. All eukaryotic unicellular organisms belong to

1. Monera
2. Protista
3. Fungi
4. Bacteria

Answer:

• Protista

14. Organisms living in salty areas are called as

1. Methanogens
2. Halophiles
3. Heliophytes
4. Thermoacidophiles

Answer:

• Halophiles

15. Naked cytoplasm, multinucleated and saprophytic specifications are the characteristics of

1. Monera
2. Protista
3. Fungi
4. Slime moulds

Answer:

• Slime moulds

16. A dikaryon is formed when

1. Meiosis is formed
2. The two haploid cells do not fuse completely
3. Cytoplasm does not fuse
4. None of the above

Answer:

• The two haploid cells do not fuse completely

17. Contagium vivum fluidum was proposed by

1. D. J. Ivanovsky
2. M. W. Beijerinck
3. Stanley
4. Robert Hook

Answer:

• M. W. Beijerinck

18. The association between mycobiont and phycobiont is found in

1. Mycorrhiza
2. Root
3. Lichens
4. BGA

Answer:

• Lichens

19. Difference between a Virus and a Viroid is

1. Absence of protein coat in viroid but present in virus.
2. Presence of low molecular weight RNA in virus but absent in viroid.
3. Both a and b
4. None of the above

Answer:

• Absence of protein coat in viroid but present in virus.

20. With respect to fungal sexual cycle, choose the correct sequence of events.

1. Karyogamy, Plasmogamy and Meiosis
2. Meiosis, Plasmogamy and Karyogamy
3. Plasmogamy, Karyogamy and Meiosis
4. Meiosis, Karyogamy and Plasmogamy

Answer:

• Plasmogamy, Karyogamy and Meiosis

21. Viruses are non-cellular organisms but replicate themselves once they infect the host cell. To which of the following kingdom do viruses belong to?

1. Monera
2. Fungi
3. Protista
4. None of the above

Answer:

• None of the above

22. As we go from species to kingdom in a taxonomic hierarchy, the number of common characteristics

1. Will decrease
2. Will increase
3. Remain same
4. May increase or decrease

Answer:

• Will decrease

23. Which of the following ‘suffixes’ used for the units of classification in plants indicates a taxonomic category of ‘family’?

1. –Ales
2. –Onae
3. –Aceae
4. –Ae

Answer:

• –Aceae

24. The term ‘systematics’ refers to

1. The identification and classification of plants and animals.
2. The nomenclature and identification of plants and animals.
3. diversity of kinds of organisms and their relationship.
4. The different kinds of organisms and their classification.

Answer:

• diversity of kinds of organisms and their relationship.

25. Genus represents

1. An individual plant or animal.
2. A collection of plants or animals.
3. Group of closely related species of plants or animals.
4. Different kinds of organisms and their classification.

Answer:

• Group of closely related species of plants or animals.

26. The taxonomic unit ‘Phylum’ in the classification of animals is equivalent to which hierarchical level in the classification of plants?

1. Class
2. Order
3. Division
4. Family

Answer:

• Division

27. Botanical gardens and zoological parks have

1. Collection of endemic living species only.
2. Collection of exotic living species only.
3. Collection of endemic and exotic living species.
4. Collection of only local plants and animals.

Answer:

• Collection of endemic and exotic living species.

28. Taxonomic key is one of the taxonomic tools in identifying and classifying plants and animals. It is used in the preparation of

1. Monographs
2. Flora
3. Both (a) and (b)
4. None of these

Answer:

• Both (a) and (b)

29. Cat and dog are placed in which families respectively

1. Felidae and Canidae
2. Poaceae and Canidae
3. Muscidae and Felidae
4. Felidae and Hominidae

Answer:

• Felidae and Canidae

30. Which of the following is a defining characteristic of living organisms?

1. Growth
2. Ability to make sound
3. Reproduction
4. Response to external stimuli

Answer:

• Response to external stimuli

31. In some animal groups, the body is found divided into compartments with at least some organs/organ repeated. This characteristic feature is named as

1. Segmentation
2. Metamerism
3. Metagenesis
4. Metamorphosis

Answer:

• Metamerism

32. Given below are the types of cells present in some animals. Each one is specialized to perform a single function except

1. Choanocytes
2. Interstitial cells
3. Gastrodermal cells
4. Nematocytes

Answer:

• Interstitial cells

Interstitial cells are reserve cells that can differentiate into any type of cell. Nematocytes are stinging cells used for offense and defense. Gastrodermal cells line the gastrodermis and intracellular digestion takes place inside these cells. All these cells are found in cnidarians. Choanocytes are found in sponges; they are specialized flagellated cells that line spongocoel and canals.

33. Which one of the following sets of animals shares a four-chambered heart?

1. Amphibians, Reptiles, Birds
2. Crocodiles, Birds, Mammals
3. Crocodiles, Lizards, Turtles
4. Lizards, Mammals, Birds

Answer:

• Crocodiles, Birds, Mammals

34. Which of the following pairs of animals has non-glandular skin?

1. Snake and Frog
2. Chameleon and Turtle
3. Frog and Pigeon
4. Crocodile and Tiger

Answer:

• Chameleon and Turtle

35. Birds and mammals share one of the following characteristics as a common feature

1. Pigmented skin
2. An alimentary canal with some modification
3. Viviparity
4. Warm-blooded nature

Answer:

• Warm-blooded nature

36. Which one of the following sets of animals belongs to a single taxonomic group?

1. Cuttlefish, Jellyfish, Silverfish, Dogfish, Starfish
2. Bat, Pigeon, Butterfly
3. Monkey, Chimpanzee, Mammalia
4. Silkworms, Tapeworm, Earthworms

Answer:

• Monkey, Chimpanzee, Mammalia

37. Which one of the following statements is incorrect?

1. Radial symmetry is found in Asterias.
2. Mesoglea is present in between ectoderm and endoderm in Obelia.
3. Fasciola is a pseudocoelomate animal.
4. Taenia is a triploblastic animal.

Answer:

• Fasciola is a pseudocoelomate animal.

38. Which of the following statements is incorrect?

1. In cockroaches and prawns, the excretion of waste material occurs through malpighian tubules.
2. In ctenophores, locomotion is mediated by comb plates.
3. In Fasciola, flame cells take part in excretion.
4. Earthworms are hermaphrodites and yet cross-fertilization takes place among them.

Answer:

• In cockroaches and prawns, the excretion of waste material occurs through malpighian tubules.

39. Which one of the following is oviparous?

1. Platypus
2. Flying fox (Bat)
3. Elephant
4. Whale

Answer:

• Platypus

40. Which one of the following is not a poisonous snake?

1. Cobra
2. Viper
3. Python
4. Krait

Answer:

• Python

Non-venomous snake bite can cause tissue damage.

41. Cyanobacteria are classified under

1. Protista
2. Plantae
3. Monera
4. Algae

Answer:

• Monera

42. Fusion of two motile gametes which are dissimilar in size is termed as

1. Oogamy
2. Isogamy
3. Anisogamy
4. Zoogamy

Answer:

• Anisogamy

43. Holdfast, stipe, and frond constitute the plant body in the case of

1. Rhodophyceae
2. Chlorophyceae
3. Phaeophyceae
4. All of the above

Answer:

• Phaeophyceae

44. A plant shows a thallus level of organization. It shows rhizoids and is haploid. It needs water to complete its life cycle because the male gametes are motile. Identify the group to which it belongs to

1. Pteridophytes
2. Bryophytes
3. Gymnosperms
4. Monocots

Answer:

• Bryophytes

45. A prothallus is

1. A structure in pteridophytes formed before the thallus develops.
2. A sporophytic free living structure formed in pteridophytes.
3. A gametophytic free living structure formed in pteridophytes.
4. A primitive structure formed after fertilization in pteridophytes.

Answer:

• A gametophytic free living structure formed in pteridophytes.

46. Plants of this group are diploid and well adapted to extreme conditions. They grow bearing sporophylls in compact structures called cones. The group in reference is

1. Monocots
2. Dicots
3. Pteridophytes
4. Gymnosperms

Answer:

• Gymnosperms

47. The embryo sac of an Angiosperm is made up of

1. 9 cells
2. 7 cells and 8 nuclei
3. 9 nuclei
4. 7 cells and 7 nuclei.

Answer:

• 7 cells and 8 nuclei

48. If the diploid number of a flowering plant is 36. What would be the chromosome number in its endosperm?

1. 36
2. 18
3. 54
4. 72

Answer:

• 54

The endosperm of flowering plants is a triploid structure. As 2n = 36, then n = 18, therefore 3n = 54.

49. Protonema is

1. Haploid and is found in mosses.
2. Diploid and is found in liverworts.
3. Diploid and is found in pteridophytes.
4. Haploid and is found in pteridophytes.

Answer:

• Haploid and is found in mosses.

50. The giant Redwood tree (Sequoia sempervirens) is a/an

1. Angiosperm
2. Free fern
3. Gymnosperm
4. Pteridophyte

Answer:

• Gymnosperm

Ecosystem diversity, which refers to the variety of Earth’s ecosystems, is the third level of diversity. Communities of living things that interact with one another and their surroundings make up an ecosystem. There are various kinds of biological systems, including woods, deserts, seas, and wetlands. Diversity in an ecosystem is crucial to its health because it makes each one unique. Coral reefs, for instance, are home to a wide range of marine life. The reef’s health and functionality are maintained by the diversity of these organisms.

The variety of the living scene is a valuable gift. Food, medicine, and other resources are provided by it. Additionally, it contributes to climate control and sustains the planet’s ecosystems. We should give our best to safeguard biodiversity and guarantee that it keeps on flourishing for people in the future.

We can preserve biodiversity in the following ways:

Protect natural environments. This implies safeguarding timberlands, wetlands, and different regions where biodiversity is plentiful.
Eliminate pollution. Pollution has the potential to harm animals and plants as well as their natural environments.
Keep an eye on invasive species. Obtrusive species are plants and creatures that have been acquainted with an area where they are not local. Ecosystems can be disrupted and native species are outcompeted by them frequently.
Sustainable farming. Soil and water quality can be preserved and biodiversity can be preserved with sustainable farming practices.
Support reasonable turn of events. Practical improvement is an advancement that addresses the issues of the present without compromising the capacity of people in the future to address their own issues. It is vital to help reasonable advancement rehearses to safeguard biodiversity.
We can contribute to the preservation of the diversity of the living world for future generations by taking these steps.