Explanation

Sclerenchyma provides rigidity and strength, while Collenchyma offers flexible support in growing parts.

Both are considered mechanical tissues because they help maintain the structural integrity of plants.

Explanation

Molar mass of CO₂ = 12 (C) + 16×2 (O) = 44 g/mol

Number of moles = Mass / Molar mass = 60 / 44 ≈ 1.364 mol

Explanation

ثواب کا مطلب ہے نیکی کا اجر یا انعام۔

Explanation

Promise: A commitment or assurance that one will do something or that something will happen.

The use of "shall" indicates a firm intention or vow about future support.

Explanation

Sand and gravel are commonly used in filtration to remove impurities and suspended particles from water.

They provide a physical barrier and are effective in both slow and rapid sand filtration processes.

Explanation

Coagulation helps neutralize the charges on particles so they can stick together.

Flocculation follows, where these particles clump into larger flocs for easy removal—both are key in water purification.

Explanation

In a balanced chemical equation, the law of conservation of mass states that atoms are neither created nor destroyed.

So, the number of atoms of each element on the reactant side is always equal to that on the product side.

Explanation

The sentence gives advice or recommendation, which is best expressed using "should."

Correct sentence: Sonia should practice much if she wants to take part in the race.

Explanation

Decaying involves the breakdown of organic matter into simpler substances through chemical reactions.

It alters the original composition of the material, which is a hallmark of a chemical change.

Explanation

Boron is a metalloid, showing properties between metals and non-metals.

Aluminum is a metal.

Phosphorus is a non-metal.