State the main function of the following:

ii. Eustachian tube.

Differentiate between the following pairs on the basis of what is mentioned within brackets:

Turgor pressure and wall pressure (Explain)

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

• Salivation at the sight of food

Chose the correct answer from the options given below:

After mitotic cell division , a female human cell will have: 

• 44 +  xx Chromosome

• 44 + xy chromosomes

• 22 + x chromosome

• 22 + x chromosome

Choose the correct answer from the options given below:

(i) Cretinism and Myxoedema are due to

• Hypersecretion of thyroxin

• Hypersecretion of growth hormone

• Hyposecretion of thyroxin

• Hyposecretion of thyroxin

Choose the correct answer from the options given below:

(iv) The antibiotic penicillin is obtained from:

• Protozoan

• Bacteria

• Virus

• Virus

Give technical terms for the following:

(x) The permanent stoppage of the menstrual cycle in a woman aged 50 years

a. Differentiate between the following pairs on the basis of what is mentioned within brackets:

Turgor pressure and wall pressure (Explain)

Choose the correct answer from the options given below:

The site of maturation of human sperms is the

• Seminiferous tubule

• Interstitial cells

• Epididymis

• Epididymis

Give technical terms for the following:

(ix) Thin walled sac of skin which covers the testes