1.

Arteries are best defined as the vessels which

• Carry blood away from the heart to different organs

• Break up into capillaries which reunite to form a vein

• Carry blood from one visceral organ to another visceral organ

• Carry blood from one visceral organ to another visceral organ

Match the source gland with its respective hormone as well as the function.

• Source gland	Hormone	Function
  Posterior pituitary	Vasopressin	Stimulates resorption of water in the distal tubules in the nephron

• Source gland	Hormone	Function
  Corpus luteum	Oestrogen	Supports pregnancy

• Source gland	Hormone	Function
  Thyroid	Thyroxine	Regulates blood calcium level

• Source gland	Hormone	Function
  Thyroid	Thyroxine	Regulates blood calcium level

Which one of the following statements is correct regarding blood pressure?

• 100/55 mmHg is considered an ideal blood pressure

• 105/50 mmHg makes one very active

• 190/110 mmHg may harm vital organs like brain and kidney

• 190/110 mmHg may harm vital organs like brain and kidney

The Eyes of the potato tuber are

• flower buds

• shoot buds

• axillary buds

• axillary buds

Two friends are eating together on a dining table. One of them suddenly starts coughing while swallowing some food. This coughing would have been due to improper movement of

• Diaphragm

• Neck

• Tongue

• Tongue

The figure given below shows a small part of human lung where exchange of gases takes place. In which one of the options given below, the one part A, B, C or D is correctly identified along with its function.

• A: Alveolar cavity - main site of exchange of respiratory gases

• D: Capillary wall - exchange of O2 and CO2 takes place here

• B : Red blood cell - transport of CO₂ mainly

• B : Red blood cell - transport of CO₂ mainly

The ciliated columnar epithelial cells in humans are known to occur in

• bronchioles and fallopian tubes

• bile duct and oesophagus

• fallopian  tubes and urethra

• fallopian  tubes and urethra

CAM helps the plants in

• secondary growth

• disease resistance

• reproduction

• reproduction

The function of leghemoglobin in the root nodules of legumes is 

• oxygen removal 

• nodule differentiation

• expression of nif gene

• expression of nif gene

'Bundle of His' is a part of which one of the following organs in humans?

• Heart

• Kidney

• Pancreas

• Pancreas