Mushrooms belong to which of the following groups?

Explanation
Fungi: Mushrooms are a type of fungi. Algae: Mostly aquatic and photosynthetic, not related to mushrooms. Bacteria: Microscopic organisms, not related to mushrooms. Protozoa: Single-celled organisms, unlike multicellular mushrooms.

Explanation
Pitch is the perception of how high or low a sound is, which depends on the frequency of the sound wave. Higher frequency → Higher pitch , Lower frequency → Lower pitch.

Explanation
Sound travels as a longitudinal wave, where particles vibrate parallel to the direction of wave motion. In contrast, light is a transverse wave, with vibrations perpendicular to the direction of propagation.

Explanation
Mass is a measure of an object's inertia — its resistance to changes in motion. Unlike weight (which depends on gravity), mass is an intrinsic property and directly related to inertia.

Explanation
A stone thrown from a height follows a projectile motion, which traces a parabolic path under gravity. This occurs due to the combination of constant horizontal velocity and accelerated vertical motion .

Explanation
Tungsten is used in bulb filaments because it has a very high melting point (~3422°C). It can withstand high temperatures without melting, making it ideal for glowing filaments.

Explanation
Neutron is a neutral particle, meaning it has no electric charge . Because of this, it didn't respond to electric or magnetic fields , making its detection difficult and late compared to protons and electrons.

Explanation
The given sentence is in past perfect passive voice : "had been bribed." Active voice of past perfect : Subject + had + past participle, hence " They had bribed the officer ."

Explanation
Why has the mirror been broken by you? This is a present perfect interrogative sentence in passive voice. Structure : Why + has/have + object + been + past participle + by subject.

Explanation
The teacher said that two and two is four. Universal truths or facts remain unchanged in indirect speech. Since " Two and two is four " is a mathematical fact, the verb " is " stays the same.