Biology
Choose the correct answer from the options given below:
Which of the following is not a natural reflex action?
- Knee-jerk
- Blinking of eyes due to strong light
- Salivation at the sight of food
- Sneezing when any irritant enters the nose
Related Questions
Choose the correct answer from the options given below:
The antibiotic penicillin is obtained from
- Protozoan
- Bacteria
- Virus
- Fungus
Match the items given in Column A with the most appropriate ones in Column B and rewrite the correct matching pairs from Column A and Column B:
Sl. No. Column A Column B 1 Pituitary gland Testosterone 2 Sulphur dioxide Calcium 3 Seminiferous tubules Growth hormone 4 Clotting of blood Acid rain 5 Guttation Sperms Global warming Magnesium Hydathodes Choose the correct answer from the options given below:
After mitotic cell division, a female human cell will have
- 44 + xx chromosomes
- 44 + xy chromosomes
- 22 + x chromosomes
- 22 + y chromosomes
Choose the correct answer from the options given below:
Cretinism and Myxoedema are due to
- Hypersecretion of thyroxin
- Hypersecretion of growth hormone
- Hyposecretion of thyroxin
- Hyposecretion of growth hormone