Explanation

Astronomy is the study of everything in the universe beyond Earth's atmosphere.

That includes objects we can see with our naked eyes, like the Sun , the Moon , the planets, and the stars 

Explanation

Vestigial organs are organs, tissues or cells in a body

Which are no more functional the way they were in their ancestral form of the trait.

Explanation

• The water potential of pure water is zero (0).
• It is taken as a standard reference point.
• Pure water has no dissolved solutes.
• Chemical formula: H2O
• Molar mass: 18.01528(33) g/mol
• Melting point: 0.00 °C (32.00 °F; 273.15 K) [b]
• Boiling point: 99.98 °C (211.96 °F; 373.13 K)

Last updated by NS on 20-April-2026

Explanation

The thyroid gland is part of the endocrine system and produces thyroid hormones,

which deficiency can cause goiter disease.

Cells producing thyroid hormones extract and absorb iodine from the blood and incorporate them into the thyroid hormones.

Explanation

The lowest part of your small intestine is the ileum.

This is where the final parts of digestive absorption take place.

The ileum absorbs bile acids, fluid, and vitamin B-12.

Explanation

Stroke volume is the amount of blood pumped by a ventricle in a single contraction.

Explanation

Diffusion. It is the movement of particles from an area of higher concentration to lower concentration.

The overall effect is to equalize concentration throughout the medium.

Examples of diffusion include perfume filling a whole room and the movement of small molecules across a cell membrane.

Explanation

Systematic sampling technique is the technique which is generally followed when the population is finite.

Explanation

Cosmic rays are high-energy particles, primarily protons and atomic nuclei, that travel through space at nearly the speed of light.

They originate from sources like supernovae and other cosmic events and can reach Earth from outside the solar system.

Explanation

Blotting paper absorbs the water through capillary action only as thin threads like structure are present in blotting paper.