Explanation

Explanation

Small intestine is the primary site for nutrient absorption into the bloodstream.

It contains villi and microvilli, which increase the surface area for efficient absorption of digested food.

Explanation

• The female reproductive part of a flower is called the Pistil.

It consists of three parts:

1. Stigma (receives pollen grains)
2. Style (connects stigma to ovary)
3. Ovary (contains ovules/eggs)

The pistil is also sometimes referred to as the carpel, which is a modified leaf that forms the female reproductive organ.

Explanation

Primary consumers are animals that eat producers (plants) and are the first level of consumers in a food chain. They are also known as herbivores. Examples of primary consumers include:

• Insects (bees, butterflies, ants)
• Small mammals (cows, goats, rabbits, mice, squirrels)
• Birds (finches, sparrows, robins)
• Fish (some species of fish that eat algae or aquatic plants)

Explanation

The recommended daily intake of Vitamin A for boys aged 13-15 years is around 5000 IU.

This helps in growth, vision, and immune function during adolescence.