Class 9 Exam > Class 9 Notes > Worksheet: Diversity in Living Organisms
Diversity in Living Organisms Class 9 Worksheet Science
Q.1. Unicellular, Prokaryotic organisms belong to which of the following Kingdom
(a) Monera
(b) Protista
(c) Fungi
(d) None of these
Q.2. The branch of Biology dealing with classification is known as–
(a) Ecology
(b) Mycology
(c) Taxonomy
(d) Physiology
Q.3. Which phylum contains the greatest number of species of animals?
(a) Porifera
(b) Nematoda
(c) Coelenterata
(d) Arthropoda
Q.4. Which of the following structures are characteristics of Pisces but not of Aves?
(a) Gills
(b) Fins
(c) Scales
(d) All of these
Q.5. Which of the following is a cryptogam?
(a) Gymnosperms
(b) Angiosperms
(c) Pteridophyta
(d) All of these
Q.6. What is the difference notochord and nerve card?
Q.7. Give difference between bony and cartilaginous fishes.
Q.8. What is Binomial nomenclature? Who proposed it?
Q.9. How pteridophytes different from phanerogams?
Q.10. How are the criteria for deciding divisions in plants different from the criteria for deciding the subgroups among animals?
Q.11. Will advanced organisms be the same as complex organisms? Why?
Q.12. Why do we classify organisms?
Q.13. What is classification? What is the need of classification? What is the basis of classification?
Q.14. How would you choose between two characteristics to be used for developing a hierarchy in classification?
Q.15. What are the advantages of classifying organisms?
You can access the solutions to this worksheet here.
FAQs on Diversity in Living Organisms Class 9 Worksheet Science
| 1. What is the importance of diversity in living organisms? |  |
Ans. Diversity in living organisms is crucial for maintaining ecological balance. It ensures that ecosystems are resilient and can adapt to changes. Each species plays a specific role in the ecosystem, contributing to processes like pollination, nutrient cycling, and food webs. A diverse range of organisms also provides humans with resources such as food, medicine, and raw materials.
| 2. How are living organisms classified? | |
Ans. Living organisms are classified using a hierarchical system known as taxonomy. This system categorizes organisms into groups based on shared characteristics. The main levels of classification are Domain, Kingdom, Phylum, Class, Order, Family, Genus, and Species. The scientific naming system, binomial nomenclature, is used to give each organism a unique two-part name.
| 3. What are the main categories of living organisms? | |
Ans. The main categories of living organisms are generally divided into five kingdoms: Monera (bacteria), Protista (protozoa and algae), Fungi (mushrooms and yeasts), Plantae (plants), and Animalia (animals). This classification reflects differences in cellular structure, modes of nutrition, and reproduction.
| 4. What role do microorganisms play in the ecosystem? | |
Ans. Microorganisms, including bacteria and fungi, play essential roles in ecosystems. They are involved in decomposition, breaking down dead organic matter and recycling nutrients back into the soil. This process enriches the soil and supports plant growth. Some microorganisms also help in nitrogen fixation, which is crucial for plant nutrition.
| 5. Why is it important to conserve biodiversity? | |
Ans. Conserving biodiversity is vital for the stability and health of ecosystems. Loss of biodiversity can lead to ecosystem collapse, affecting food security, clean water, and air quality. Additionally, many species have yet to be discovered and could hold potential benefits for medicine and agriculture. Protecting biodiversity ensures that future generations can enjoy a rich and varied natural world.
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