Explanation

During swimming, knees and ankles play a key role in kicking movements.

These joints allow flexion and extension, providing thrust in the water.

Explanation

In a straight forward roll, the hands push against the ground to initiate and guide the roll.

This helps shift the body weight forward and maintain balance during the movement.

Explanation

Heart muscle (cardiac muscle) contracts automatically without conscious control — it's involuntary.

Neck and leg muscles are voluntary and controlled by conscious effort.

Explanation

Sesamoid bones are extremely small bones found in within muscles or tendons (e.g., the kneecap or patella).

They protect tendons from stress and wear.

Explanation

In Kabaddi, the distance between the two posts (called Palas) is 20 feet in standard men's matches.

These posts mark the ends of the court and help define the playing area.

Explanation

The galactic bulge is the bright, dense center of a spiral galaxy.

It contains old stars.

It often a supermassive black hole at the core.

Explanation

The oxygen cycle is closely linked with the carbon cycle through processes like photosynthesis and respiration.

Plants release O₂ during photosynthesis (using CO₂), while animals and humans consume O₂ and release CO₂ during respiration.

Explanation

• When an object reflects all the component colors of light, it appears white.
• This is because the object is reflecting all the wavelengths of visible light, which are then perceived by our eyes as white.
• If an object absorbs all seven colors of light (i.e., all the wavelengths of visible light), it appears black.

Explanation

Explanation

Table tennis balls are usually white or yellow for better visibility against different table and background colors.

These colors are approved by the International Table Tennis Federation (ITTF) for official play.