Explanation

Photosynthesis occurs most efficiently in this temperature range, as enzymes involved in the process function optimally.

Temperatures above 35°C can inhibit enzyme activity, reducing the rate of photosynthesis.

Explanation

The chemical formula for tetrafluoroethylene is C₂F₄.

Key points about Teflon:

Chemical name: Polytetrafluoroethylene (PTFE)

Monomer: Tetrafluoroethylene

Notable property: Highly non-stick surface, often used in cooking utensils

Explanation

An element with 7 valence electrons needs 1 more electron to complete its octet.

Therefore, its valency is 1, as it tends to gain 1 electron during bonding.

Explanation

Cobalt-60, an isotope of cobalt, is widely used in radiation therapy to treat cancer.

It emits gamma rays, which help destroy cancerous cells in medical treatments.

Explanation

The carbon dioxide (CO₂) molecule has a linear structure, with a bond angle of 180°.

Due to the two double bonds between carbon and oxygen atoms.

Explanation

• All cells arise from pre-existing cells — this is cell theory.
• Confirmed by Rudolf Virchow (1855): "Omnis cellula e cellula" (every cell from a cell).
• New cells form through cell division — mitosis (growth/repair) and meiosis (reproduction).
• No cell appears spontaneously; all trace back to an earlier cell.

Explanation

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

Undersea earthquakes displace a large volume of water, generating powerful sea waves.

This sudden movement creates a tsunami, which can travel across oceans at high speeds.

Explanation

Sucrose is also known as Table sugar.

Sucrose is a type of common sugar.

It is a disaccharide, a molecule which consists of two monosaccharides: glucose and fructose.