Explanation

The yeast used in baking bread is a single-celled fungus,

Specifically, a strain of Saccharomyces cerevisiae, 

It's a living microorganism that ferments sugars in dough, producing gases that cause bread to expand.

Explanation

• The study of relationships between organisms and their environment is called Ecology.
• It helps understand how living things interact with each other and with their surroundings.

Additional information:

• Embryology studies development of embryos.
• Ethology studies animal behavior.
• Entomology studies insects.

Last verified on 16-01-2026

Explanation

• Exobiology specifically studies life beyond Earth.
• Astrobiology combines biology, chemistry, and astronomy to study life in the universe.

Explanation

Turnip is best described as a napiform root

This shape is characterized as being swollen or spherical at the base and abruptly tapering towards a point at the apex

Explanation

Oxygen constitutes about 21%, or more precisely 20.95%, of the Earth's atmosphere by volume

Present about one-fifth of the air.

Supports respiration.

Needed for combustion.

Maintains balance in the atmosphere.

Explanation

Ethnology is the branch of science that deals with the study of races, cultures, and ethnic groups of humans.

The study of human races, particularly their physical characteristics, origins, and distribution

Explanation

A dentist diagnoses and treats tooth decay, cavities, and other dental problems.

Caries refers to tooth decay or cavities caused by bacteria.

It affects enamel and dentin of the teeth.

Early treatment prevents pain, infection, and tooth loss.

The specialist for oral health issues should be consulted.

Explanation

The enzyme responsible for breaking down starch into maltose in the human digestive system is amylase. 

Amylase is an enzyme produced in the saliva and pancreas that specifically breaks down starch into smaller sugar molecules like maltose.

Explanation

D 1 appears to refer to a specific genotype, D1.1, of the H5N1 avian influenza (bird flu) virus. 

The "H" stands for Hemagglutinin, and "N" for Neuraminidase — proteins found on the surface of the influenza virus.  

So, HX is associated with viruses, not bacteria, vaccines, or fungi. 

Explanation

This is Einstein’s famous mass-energy equivalence formula, where:  

- E = Energy  

- m = Mass  

- c = Speed of light (approximately 3 × 10⁸ m/s)