Explanation

Zingiber officinale is the scientific name for ginger.

It is a commonly used spice and medicinal root.

It belongs to the Zingiberaceae family and grows as an underground stem (rhizome).

Explanation

The average weight of an adult human brain is about 1300 to 1400 grams.

It makes up around 2% of the total body weight but consumes about 20% of the body's energy.

Explanation

A gene is the basic physical and functional unit of heredity.

Genes are made up of DNA.

Explanation

Explanation

Vitamin A is found in:

• Carrots (beta-carotene, a precursor to vitamin A)
• Cod-liver oil (rich in vitamin A)
• Oil (such as cod-liver oil, halibut-liver oil, and shark-liver oil)

Additionally, vitamin A is also found in other foods like:

• Sweet potatoes
• Dark leafy greens (like spinach and kale)
• Squash
• Fatty fish (like salmon and mackerel)
• Egg yolks
• Dairy products (like milk and cheese)

Explanation

• Unicellular organisms, like Amoeba and Paramecium, are composed of only one cell.
• Plants (fern and coconut) and animals (hydra and eagle) are composed of many cells, making them multicellular organisms.

Explanation

Veins carry blood toward the heart.

They have valves to prevent the backward flow of blood due to low pressure, especially in the limbs.

Arteries do not have valves (except at the heart).

Capillaries are too small and thin to have valves.

Explanation

The diaphragm is a muscle that plays a crucial role in respiration.

It helping to expand and contract the lungs for breathing.

Explanation

Explanation

• Microscopes are used to magnify and observe tiny objects.
• Such as microorganisms, cells, and tiny structures.
• That are not visible to the naked eye.