Biology
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
Related Questions
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
The figure given below represents an experimental setup with a weighing machine to demonstrate a particular process in plants. The experimental setup was placed in bright sunlight. Study the diagram and answer the following questions:
(i) Name the process intended for study.
(ii) Define the above mentioned process.
(iii) When the weight of the test tube (A & B) is taken before and after the experiment, what is observed? Give reasons to justify your observation in A & B.
(iv) What is the purpose of keeping the test tube B in the experimental setup?
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