Explanation

Epithelial tissue forms the inner lining of the mouth, providing a protective barrier.

It is composed of layers of cells that protect underlying tissues.

Explanation

Spirogyra is an algae, whereas Mold, Yeast, and Rhizopus are fungi.

It performs photosynthesis, while fungi are decomposers.

Explanation

Phloem tissue transports food (sugars) from leaves to other parts of the plant.

Mesophyll tissue in leaves contains chloroplasts and performs photosynthesis.

Xylem tissue conducts water and minerals from roots to leaves.

Explanation

Compounds are substances made of two or more elements chemically bonded.

Baking soda (NaHCO₃), water (H₂O), and salt (NaCl) are all compounds.

Nickel and iron are elements, and salad and ink are mixtures.

Explanation

The Big Bang occurred approximately 13.8 to 15 billion years ago, marking the origin of the universe.

It led to the rapid expansion of space, eventually forming galaxies, stars, and planets.

Explanation

Explanation

Tin and Nickel both have a silvery-white appearance.

They are corrosion-resistant metals commonly used in coatings and alloys.

Explanation

Frequency is the number of cycles per unit time in a periodic wave.

It is measured in Hertz (Hz), where 1 Hz equals one cycle per second.

Explanation

Sublimation is the process where a solid directly changes into gas without becoming liquid.

Dry ice (solid CO₂) undergoes sublimation at room temperature.

Explanation

NaCl (sodium chloride) is a compound.

Because it consists of two different elements (sodium and chlorine) chemically bonded.