Explanation

Platelets are not of different types or shapes—they are small, irregular, disc-shaped cell fragments.

They all serve the same function in blood clotting.

They are not classified into types.

Explanation

Discontinuous variation involves traits like blood group or tongue rolling, where individuals fall into clear, separate categories.

There are no intermediate states—either you have the trait or you don’t.

Explanation

Carnivorous plants trap and digest insects to obtain nitrogen, especially in nutrient-poor soils.

Examples include Venus flytrap, pitcher plant, and sundew.

Explanation

An electrical impulse causes the cardiac cell's resting potential to convert into an action potential.

This action potential leads to contraction of heart muscle cells, enabling the heart to beat.

Explanation

• The liver produces bile, which is a digestive fluid that helps break down fats and absorbs fat-soluble vitamins.
• The liver produces about 1 liter of bile daily, which is then stored in the gallbladder and released into the small intestine through the bile duct.

Explanation

72 beats per minute is a good heart rate.

Complete answer:

The resting person usually has a pulse rate between 70 (beats per minute) and 80 (beats per minute).

Your risk of dying from a heart attack is lower if your heart rate is below 80 beats per minute.

A normal resting heart rate ranges from 60 to 100 beats per minute.

Explanation

Explanation

Vitamin C, also known as ascorbic acid, is necessary for the growth, development and repair of all body tissues.

Vitamin C is a water-soluble vitamin found in citrus fruits and other fruits and vegetables, and is also sold as a dietary supplement.

A natural water-soluble vitamin (Vitamin C)

Vitamin C, also known as ascorbic acid.

Vitamin C is necessary for the growth, development, and repair of all body tissues.

Explanation

Cartilaginous rings in the respiratory tract, like those in the trachea and bronchi, serve multiple functions: 

Support:

The rings provide structural support to the airways.

They keep the trachea and bronchi open and stable. 

Keep the passage open:

This is directly related to the support function.

Prevent collapsing:

The rings are crucial in preventing the collapse of the airways, especially during exhalation when pressure changes occur. 

Explanation

The lateral walls of the chest cavity are composed of ribs and intercostal muscles. 

The ribs form the bony structure of the chest cavity, while the intercostal muscles are located between the ribs and play a crucial role in breathing