Explanation

The rod cells of the retina are responsible for vision in dim light or at night (scotopic vision),

Providing black and white, low-resolution vision, and contributing to peripheral vision.

They are more numerous and more sensitive to light than cone cells, but they cannot detect color or fine details. 

Explanation

Penguins are the birds which do not fly but swim to go from one place to another.

Penguins have flippers which help them swim underwater.

Penguin means پنکھ دار بحری پرندہ

Explanation

Elephants, bears, chickens, monkeys, cows, wolf, birds, etc. are warm blooded animals

Warm blooded means گرم خون والا

Explanation

An invertebrate is an animal without a backbone.

Worms, like earthworms, are classified as invertebrates.

They lack a backbone and are found in various environments. 

Explanation

Female ostriches lay the largest eggs of any living bird.

These gigantic birds are the biggest birds on the planet.

Explanation

• Venus and Mercury are the only planets in the solar system that do not have any natural satellites or moons.
• Likely due to their proximity to the Sun and gravitational influences.

Explanation

Magnesium deficiency can contribute to or exacerbate all of the following health issues:

• Painful joints: Magnesium helps regulate inflammation and muscle function, and deficiency can lead to joint pain and stiffness.
• Osteoporosis: Magnesium is essential for bone mineralization and density; deficiency can increase the risk of osteoporosis and fractures.
• Memory loss: Magnesium plays a role in neuronal function and synaptic plasticity; deficiency has been linked to cognitive impairment and memory loss.
• Diabetes: Magnesium helps regulate insulin sensitivity and glucose metabolism; deficiency can increase the risk of developing type 2 diabetes.

Explanation

• The camel is called the “ship of the desert”
• Because it travels easily on sand.
• It can survive long periods without water, making it ideal for desert transport.

Last updated 25-07-2026 by NA

Explanation

The pH of pure water (H20) is 7 at 25 °C

pH stands for "Potential Hydrogen"

Explanation

Plants produce sugar and starch using sunlight through photosynthesis.

It is a process where light energy converts carbon dioxide and water into glucose and oxygen.