Explanation

The direction of energy flow in an ecosystem is unidirectional, moving through various trophic levels successively.

It begins with the input of solar energy, which is captured by primary producers, such as plants, through photosynthesis.

Explanation

Chromosomes are thread-like structures in the nucleus carrying genetic information (DNA).

They determine an organism’s traits and heredity.

Explanation

Explanation

Explanation

A solar eclipse can only take place during the phase of the new moon

when the moon passes directly between the sun and Earth and its shadows fall upon Earth's surface.

Explanation

1 kilowatt hour (kWh) = 1000 watts × 3600 seconds

1 kWh = 1,000 × 3,600 = 3,600,000 joules (J)

Explanation

Biomass energy comes from plants, which get their energy through photosynthesis using sunlight.

So, the Sun is the original source of energy for all biomass.

Explanation

Osmosis is the movement of water molecules through a semipermeable membrane from an area of higher water concentration to lower concentration.

It is a vital process in biological systems for maintaining cell balance.

Explanation

Given:

Volume of compound C at STP = 0.112 dm³

1 mole gas at STP = 22.4 dm³

So, moles of C = 0.112 ÷ 22.4 = 0.005 mol

CO₂ produced:

Mass = 0.88 g

Moles of CO₂ = 0.88 ÷ 44 = 0.02 mol

Mole ratio:

0.005 mol of C → produced 0.02 mol of CO₂

Ratio CO₂ : C = 0.02 ÷ 0.005 = 4

👉 That means 4 carbon atoms are present in one molecule of C.

Explanation