Explanation

• The ribcage, which consists of the ribs and sternum.
• It forms a protective cage around the thoracic cavity, shielding the vital organs within, including the heart and lungs.

Explanation

• Each bronchial tube (bronchus) is joined to each lung.
• The bronchi are airways that branch off from the trachea (windpipe) and enter the lungs, allowing air to pass through during breathing.

Explanation

• An open circuit provides an incomplete path for the current to flow through.
• As the circuit is broken or disconnected, preventing electricity from flowing.

Explanation

• A pulley system is commonly used to raise and lower flags.
• As it allows for a change in direction of the force and makes it easier to lift the flag to a higher position.

Explanation

• Liquids take the shape of a container because they have a fixed volume but no fixed shape.
• They conform to the shape of the container they are placed in.

Explanation

Iodine is present in:

• Seafood (especially seaweed and shellfish)
• Iodized salt
• Meat (in small amounts)
• Onions (in small amounts)
• Eggs (in small amounts)

Iodine is essential for thyroid function and brain development.

Explanation

• Blue Whales have a thick layer of fat, known as blubber, under their skin that helps to keep them warm in cold water.
• This layer of fat can be up to 30 cm (12 in) thick and makes up about 50% of their body weight.

Explanation

• A solution is a type of mixture that is homogeneous, meaning it has a uniform composition and properties throughout.
• It is a mixture of two or more substances, where one substance (the solute) is dissolved in another substance (the solvent).

Explanation

Animals can be classified into three main categories based on their food type:

1. Herbivores (plant-eaters): These animals eat only plants, including leaves, stems, roots, flowers, fruits, and seeds. Examples: Cows, Deer, Rabbits, Elephants
2. Carnivores (meat-eaters): These animals eat only meat, primarily from other animals. Examples: Lions, Tigers, Bears, Wolves
3. Omnivores (both plant and meat-eaters): These animals eat both plants and animals. Examples: Humans, Pigs, Bears (some species), Chimpanzees

Explanation

• Introducing mosquito-eating fish, such as guppies or mosquitofish (Gambusia affinis), into water bodies can help control mosquito populations, including the dengue mosquito (Aedes aegypti).
• These fish feed on mosquito larvae and help prevent them from developing into adult mosquitoes.