Blood group classification is based on the antigens present on the surface of red blood cells and the antibodies present in the plasma.

The dental formula of an adult human is $\frac{2123}{2123}$, where I=2, C=1, PM=2, M=3.

In the AB blood group, both A and B antigens are visible, which is a prime example of co-dominance.

The Aorta is the largest and main artery of the body, which originates from the left ventricle of the heart and through which oxygenated blood circulates to all body tissues.

In a normal human eye, light rays are focused on the retina after refraction.

The human excretory system consists of kidneys (b), ureters (a), urinary bladder (e), and urethra (d). Green glands are the excretory organs of some arthropods (e.g., crustaceans).

Wisdom teeth or the third molars are the names of teeth that emerge last. It is a vestigial organ.

Kidneys maintain the acid-base balance in the body by regulating the acidity and alkalinity of the blood.

Bowman's capsule is a part of the nephron, not the neuron. The main parts of a neuron are the cell body, dendrites, and axon.

A biopsy is a medical procedure in which a small sample of tissue is taken and examined under a microscope. A tissue sample can be taken from anywhere in your body, in addition to the skin, stomach, kidney, liver, and lungs.

The normal cholesterol level in human blood is considered to be 180-200 mg/dL.

Statement 2 is true. Old and damaged red blood cells (RBC) are destroyed in the spleen.

At rest, the respiratory rate of an adult human is generally 15 to 18 times per minute.

A person with blood group 'A' can receive blood from 'A' and 'O' groups. Here, the wife (O), son (A), and daughter (O) can donate. The brother (AB) cannot donate. Therefore, the correct answer is (i), (iii) and (iv).

AB+ is the universal recipient (can receive from all) and O- is the universal donor (can donate to all).

A deep vertical fissure (Longitudinal Fissure) divides the cerebrum into two parts, right and left cerebral hemispheres.

Correct matching: a-2 (Glucagon), b-4 (Parathormone), c-1 (Melatonin), d-3 (Aldosterone).

See explanation of the above question.

Adrenaline hormone increases heart rate and causes excitement in emergency situations (fight or flight).

Accessory digestive organs include the pancreas, gall bladder, salivary glands, and tongue, which assist in digestion but are not part of the main gastrointestinal tract. Stomach and small intestine are primary digestive organs.