SEBA Class 9 Science Important Chapter 7 Diversity in Living Organisms

SEBA Class 9 Science Important Chapter 7 Diversity in Living Organisms Solutions English Medium As Per SEBA New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters SEBA Class 9 General Science Additional Solutions and select need one. NCERT Important Solutions For Class 9 General Science Download PDF. Important Notes for Class 9 Science.

SEBA Class 9 Science Important Chapter 7 Diversity in Living Organisms

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. Assam SEBA Board Class 9 Science Additional Question Answer are part of All Subject Solutions. Here we have given CBSE Class 9 Science Important Notes for All Chapters, You can practice these here.

Diversity in Living Organisms

Chapter: 7

IMPORTANT QUESTION ANSWER

Answer the Following Question:

1. What is biodiversity?

Ans: Biodiversity refers to the variety of life forms found in a particular region.

2. Who introduced the five-kingdom classification?

Ans: R.H. Whittaker.

3. Name the simple, aquatic plants without differentiated body parts.

Ans: Thallophyta (e.g., Spirogyra).

4. Name an example of a flatworm.

Ans: Liver fluke.

5. What is a notochord?

Ans: A rod-like structure that supports the body in chordates.

6. Why is classification of living organisms important?

Ans: Classification helps in:

(i) Identifying and grouping similar organisms.

(ii) Understanding the diversity and evolutionary relationships.

(iii) Simplifying the study of millions of organisms.

(iv) Providing a universal naming system through binomial nomenclature.

7. What is meant by binomial nomenclature? Write its rules.

Ans: Binomial nomenclature is the scientific naming system of organisms using two Latin names – Genus and Species.
Rules:

(i) Genus starts with a capital letter.

(ii) Species starts with a small letter.

(iii) Printed in italics or underlined separately if handwritten.

8. What is the significance of evolution in classification?

Ans: (i) Evolution helps us understand how simpler organisms evolved into complex ones.

(ii) Organisms with ancient body plans are considered primitive, while newer forms are advanced.

(iii) Classification reflects evolutionary relationships and timelines.

9. What are the characteristics of vertebrates?

Ans: (i) Notochord present at some stage.

(ii) Dorsal nerve cord.

(iii) Coelomate and triploblastic body structure.

(iv) Complex organ systems and internal skeleton (e.g., fish, birds, mammals).

10. State three features of Kingdom Fungi.

Ans: (i) Eukaryotic and mostly multicellular.

(ii) Heterotrophic: saprophytic or parasitic.

(iii) Cell wall made of chitin.

(iv) Examples: yeast, mold, mushroom.

11. What is the function of the notochord?

Ans: (i) A rod-like structure providing support.

(ii) Separates the nervous tissue from the gut.

(iii) Helps in muscle attachment for movement.

(iv) Found in chordates during some stage of life.

12. Difference between Gymnosperms and Angiosperms.

Ans: 

Gymnosperms	Angiosperms
(i) Seeds are naked and not enclosed in fruits.	(i) Seeds are enclosed within fruits.
(ii) Mostly woody and evergreen plants.	(ii) Can be herbs, shrubs, or trees.
(iii) Vascular tissues are less advanced.	(iii) Vascular tissues are well-developed.
(iv) Pollination mainly by wind.	(iv) Pollination by insects, wind, or animals.

13. What are lichens? Why are they considered symbiotic?

Ans: Lichens are symbiotic associations between a fungus and a cyanobacterium or algae.The fungus provides protection and support, while the alga or cyanobacterium performs photosynthesis to provide food.Hence, both organisms benefit.

14. Why is Kingdom Protista considered a link between prokaryotes and multicellular organisms?

Ans: Protists are unicellular eukaryotes with features like membrane-bound organelles and a nucleus, unlike prokaryotes.They are more advanced than Monera but simpler than multicellular fungi, plants, or animals hence act as a link.

15. Write any three characteristics of Phylum Mollusca.

Ans: (i) Soft-bodied and unsegmented.

(ii) Reduced coelom; open circulatory system.

(iii) Have a muscular foot for movement and a shell in most cases.

Examples: Snail, Mussel.