MIC | MCQs

Explanation

• In both microscopes and human eyes, the iris (or diaphragm) controls the amount of light that enters the instrument or eye.
• In microscopes, it regulates the amount of light that reaches the objective lens.
• While in human eyes, it regulates the amount of light that enters the pupil.

Explanation

• The maize seed is surrounded by a seed coat (also known as the testa) and has an opening called the micropyle.
• The micropyle is a small pore or opening in the seed coat through which water enters the seed during germination.
• It allowing the seed to absorb moisture and begin the germination process.

Explanation

• Yeast is a type of fungus, specifically a single-celled fungus that belongs to the kingdom Fungi.
• It is a eukaryotic microorganism that is capable of fermenting sugars.
• It is commonly used in baking and brewing.

Explanation

• Escherichia coli (E. coli) is a type of bacterium.
• It is commonly found in the gut of humans and animals.
• It plays a important role in the digestive process. 

Explanation

Microorganisms are typically classified into three main groups:

1. Bacteria (single-celled prokaryotes)
2. Viruses (tiny infectious agents that replicate inside the cells of an organism)
3. Fungi (organisms that obtain their nutrients by decomposing organic matter or by forming symbiotic relationships with other organisms)

Explanation

Amoebas do not have cell walls because they are not plant cells.

Explanation

Stage clips hold the slides in place. If your microscope has a mechanical stage, the slide is controlled by turning two knobs instead of having to move it manually.

Explanation

Explanation

The Kinetic Molecular Theory (KMT) is associated with James Clerk Maxwell. 

Explanation

• A microphone converts sound waves into electrical signals, which are analogue in nature.
• The voltage signal generated by a microphone is a continuous signal that varies in amplitude and frequency in response to the sound waves.
• This signal is an analogue representation of the sound wave, and it is not digital.