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: 15/06/2021
QB365 provides detailed and simple solution for every Book back Questions in class 9 Science Subject. It will helps to get more idea about question pattern in every book back questions with solution.
Download 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.
List the integumentary glands of mammals.
2.
On the basis of Position of notochord, classify the different Prochordates. Justify your answer.
3.
Comment on the aquatic and terrestrial habits of amphibians.
4.
Outline the flow charts of Phylum Chordata.
5.
How is the body wall of coelenterates arranged?
1.
The integumentary glands of mammals are
Sweat, sebaceous, scent glands and mammary glands. Mammary glands are the modified integumentary glands.
2.
On the basis of position of notochord, the different prochordates are classified as follows.
1. Sub-phylum Hemichordata : The notochord is persistant as the stomochord in the anterior region of the animal. e.g., Balanoglossus.
2. Sub-phylum - Cephalochordata : The persistent notochord extends forward beyond the brain. e.g., Amphioxus.
3. Sub-phylum - Urochordata : The notochord is confined to the tail region of the larva, e.g., Asicidian.
3.
Aquatic habits of amphibians:
1. The larva of amphibians (tadpole) lives in water and breathes with gills.
2. External fertilization occurs in frog with water as a medium of fertilization.
3. The adult frog has webbed feet to swim in water
4. The skin is moist and glandular which helps in Respiration.
Terrestial habits of amphibians:
1. The adult live on land and breathe through lungs. Bucco-Pharynx also helps in respiration.
2. The fore limbs are short and help to hop on land.
4.
5.
The body wall is of two layers of cells namely the outer ectoderm and the inner endoderm, which is separated from each other by a non-cellular jelly-like substance called mesoglea.
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
