9th Standard Syllabus & Materials
9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -கற்கண்டு (இலக்கணம்) - தொடர் இலக்கணம், ஆகுபெயர் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -விரிவானம் (துணைப்பாடம்) - தாய்மைக்கு வறட்சி இல்லை! Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -கவிதை பேழை (செய்யுள்) - மார்கழி பெருவிழா Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உயிருக்கு வேர்-இலக்கணம் - பகுபத உறுப்பிலக்கணம் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil அமுதென்று பேர் - இலக்கணம்-எழுத்து -அளபெடை Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil அமுதென்று பேர்-துணைப்பாடம் - ஆறாம்திணை Important Questions And Answers Study Material - QB365 Set A
Published on: 13/05/2022
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latest Book back QuestionsDownload Tamil Nadu 9th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test1.
How are the limbs of the birds adapted for avian life?
2.
How is the reproductive characters of mammals different from those of Aves?
3.
List five characteristic features of fishes.
4.
Differentiate between flat worms and round worms?
5.
List the excretory organs of invertebrates in relation to their habitats.
1.
i) Forelimbs of birds are modified into wings with feathers for flight.
ii) The hind limbs are adapted for walking perching or swimming.
2.
Reproductive characters of mammals differ from those of Aves by
1. The presence of mammary glands.
2. Testes lie outside the body cavity enclosed in scrotal sacs.
3. Alecithal eggs.
4. Fertilization is always internal.
5. They give birth to young ones and feed their youngones with milk.
6. Placenta is a characteristic feature of mammals.
3.
1. Fishes are poikilothermic, aquatic vertebrate with jaw.
2. Body is streamlined and differentiated into head, trunk, and tail.
3. Locomotion is by paired and median fins.
4. Body has covering of scales.
5. Respiration is performed by gills. Gill slits are 5-7 pairs.
4.
| S.No | Flat worms | Round worms |
| 1. | It is phylum platyhelminthes. | It is phylum Aschelminthes |
| 2. | The alimentary canel is either absent or very simple |
The alimentary canal is straight tube. |
| 3. | Having both male and female reproductive organ in a single individual. |
Sexes are separate individual. |
5.
| Phylum | Excretory organ | Habitat | Function |
| 1. Protozoa | General Body surface and contractile vacuole | aquatic | Eliminates waste products. |
| 2. Porifera | General Body Surface | aquatic | Eliminates waste products. |
| 3. Coelenterata | General Body Surface | aquatic-marine | Eliminates waste products. |
| 4. Platyhelminthes | Flame cells | Parasitic | Excretion and Osmoregulation |
| 5. Aschelminthes | Renette cells/Excretory tube | Free living soil nematodes (or) | Excretion |
| 6. Annelida | Nephridia and Chloragogen cells. | Aquatic and terrestrial forms. | Excretes waste |
| 7. Arthropoda | Malpighian tubules Green gland | Aquatic and terrestrial forms. | Excretes waste |
| 8. Mollusca | Organ of Bojanus | Both marine and fresh water | Excretion |
| 9. Echinoderm | Amoebocyte | Aquatic | Excretion |
9th Standard Syllabus & Materials
9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - திருக்குறள் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - மணிமேகலை Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - ஏறு தழுவுதல் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உயிருக்கு வேர் - தண்ணீர் Important Questions And Answers Study Material - QB365 Set A
Tamilnadu Stateboard 9th Standard Subjects
Tamilnadu Stateboard Standards
