Explanation

• The endosperm is the main storage tissue in maize seeds.
• It containing nutrients like starch, proteins, and oils.
• It support the growth of the embryo during germination.

Last verified on 22-01-2026

Explanation

Our solar system takes approximately 225 to 230 million Earth years to complete one full orbit around the center of the Milky Way galaxy,

A period known as a galactic year or cosmic year. 

Traveling at about 514,000 mph (828,000 km/h)

Given the Sun's age, it has circled the galactic center about 20 times. 

Explanation

Explanation

The outermost layer of the Sun is called the corona.

It is the Sun's outer atmosphere, extending millions of kilometers into space and visible during a total solar eclipse.

The innermost layer is the core, where nuclear fusion occurs.

Explanation

The ozone layer is a region within the stratosphere, extending from about 15 to 30 km (9 to 19 miles) above the Earth's surface.

It contains a high concentration of ozone (O3), a molecule made up of three oxygen atoms. 

The ozone layer plays a crucial role in protecting the Earth from harmful ultraviolet (UV) radiation from the sun, particularly UV-C and UV-B rays.

Explanation

Homeostasis is the set of metabolic reactions that maintain the internal environment of an organism, regulating factors.

Such as temperature, pH, blood sugar levels, and blood pressure.

Explanation

• Carbon dioxide (CO2) is a major greenhouse gas.
• It responsible for about 65% of the Earth's greenhouse effect.

Explanation

Opaque objects form sharp and dark shadows because they block all light from passing through, creating a clear and defined shadow.

Explanation

Vitamin C is essential for growth and repair of tissues in the body.

Protein formation: Vitamin C helps form collagen, a protein used to create skin, tendons, ligaments, and blood vessels.

Wound healing: Vitamin C helps heal wounds and form scar tissue.

Bone, teeth, and cartilage repair: Vitamin C helps repair and maintain bones, teeth, and cartilage.

Iron absorption: Vitamin C helps the body absorb iron. 

Vitamin C is also an antioxidant that promotes healthy teeth and gums.

A deficiency in vitamin C can lead to scurvy.

Explanation

• Fission is the splitting of a nucleus that releases free neutrons and lighter nuclei.
• The fission of heavy elements is highly exothermic which releases about 200 million eV compared to burning coal which only gives a few eV.