In mouth cavity of many molluscs there is a rasping tongue like structure_________provided with many horny teeth.

✅ C. Cotton

Option A: Silk Option B: Wool Option C: Cotton Option D: Paper Correct Answer : Cotton Read more

✅ A. Primary wall

Option A: Primary wall Option B: Secondary wall Option C: Middle lamella Option D: All of these Correct Answer : Primary wall Read more

✅ D. All of these

Option A: Antibodies. Option B: Interferons Option C: Antitoxins Option D: All of these Correct Answer : All of these Read more

✅ C. Both of these

Option A: Brain Option B: Spinal cord Option C: Both of these Option D: none of these Correct Answer : Both of these Read more

✅ B. Bacillariophyceae

Option A: Chrysophyta Option B: Bacillariophyceae Option C: Xanthophyceae Option D: Both A. and B. Correct Answer : Both and B. Read more

✅ A. Pellicle

Option A: Pellicle Option B: Penicle Option C: Calcium Option D: Cell wall Correct Answer : Pellicle Read more

✅ C. 5

Option A: 7 Option B: 12 Option C: 5 Option D: 4 Correct Answer : 5 Read more

✅ D. Jawless fishes

Option A: Frogs Option B: Reptiles Option C: Amphibinas Option D: Jawless fishes Correct Answer : Jawless fishes Read more