Explanation

3% of Earth's water is fresh water.

2.5% of that fresh water is unavailable because it is:

• Locked in glaciers and polar ice caps
• Present in the atmosphere and soil
• Too deep underground to extract affordably

Only 0.5% of Earth's water is available as usable fresh water for human use.

Explanation

Dendrites are branched fibers that receive nerve impulses and carry them toward the cell body.

They act like antennas, picking up signals from other neurons.

Explanation

Antibodies are specialized proteins produced by the immune system to identify and neutralize viruses and bacteria.

They specifically bind to foreign particles (antigens) to help destroy them.

Explanation

Alveoli are tiny air sacs in the lungs where oxygen enters the blood and carbon dioxide is removed.

Their thin walls and rich capillary network make gas exchange efficient.

Explanation

In a DNA molecule, adenine (A) always pairs with thymine (T) through two hydrogen bonds.

This specific pairing maintains the structure and stability of the DNA double helix.

Explanation

In mutualism, both organisms benefit: microorganisms help digest cellulose, and herbivores provide food and shelter.

This relationship is cooperative, where neither is harmed but both gain advantages.

Explanation

An Electrocardiogram (ECG) records the electrical activity of the heart.

It helps diagnose heart conditions like arrhythmias, heart attacks, and other cardiac issues.

Explanation

Transcription is the process where DNA is used to create mRNA.

Translation then follows, where mRNA is used to synthesize proteins in the cytoplasm.

Explanation

Explanation

Molluscs are soft-bodied animals that may or may not have a shell and can live in aquatic environments like ponds, lakes, rivers, and oceans.

Examples include snails, clams, and octopuses