Explanation

The correct answer is: Molecules do not collide with one another

Gas molecules:

• Are widely separated
• Have low attractive forces
• Are free to move in any direction
• Collide with one another

Explanation

• When a French bean germinates in soil, a hook-like structure emerges, which is called the hypocotyl.
• The hypocotyl is the stem of the seedling, and in French beans.
• It forms a hook-like structure that pushes the cotyledon (seed leaf) upwards.

Explanation

• The maize seed is surrounded by a seed coat (also known as the testa) and has an opening called the micropyle.
• The micropyle is a small pore or opening in the seed coat through which water enters the seed during germination.
• It allowing the seed to absorb moisture and begin the germination process.

Explanation

Diarrhea and typhoid are caused by bacterial infections:

• Diarrhea can be caused by various bacteria, such as E. coli, Salmonella, Shigella, and Campylobacter.
• Typhoid is caused by the bacterium Salmonella Typhi (S. Typhi).

Explanation

• Non-flowering plants, such as ferns, mosses, and liverworts, produce spores as their reproductive structures, instead of seeds.
• Spores are similar to the seeds of flowering plants, but are much smaller and more primitive.
• They allow non-flowering plants to disperse and colonize new areas.

Explanation

According to the World Health Organization (WHO), the industrial limit of sound in industries must be 75 dB (Decibels).

Explanation

There are three main scales used to measure temperature:

1. Celsius scale: Water freezes at 0°C and boils at 100°C.
2. Fahrenheit scale: Water freezes at 32°F and boils at 212°F.
3. Kelvin scale: Absolute zero (the theoretical minimum temperature) is 0K, and water freezes at 273.15K and boils at 373.15K.

Explanation

• Liquids can be converted into gases by heating, a process known as vaporization or evaporation.
• As the temperature increases, the particles of the liquid gain energy and move faster, eventually breaking free from the surface tension of the liquid and turning into a gas.

Explanation

• Carnivores are secondary consumers that eat primary consumers (herbivores).
• In this case, birds and mice are primary consumers (herbivores) that eat plants and plant products.
• Carnivores that eat birds and mice are secondary consumers.

Examples of carnivores that might eat birds and mice include:

• Hawks and owls (birds of prey)
• Foxes, wolves, and cats (mammals)
• Snakes and lizards (reptiles)

Explanation

Calcium is an essential mineral found in various foods, including:

• Milk and dairy products (cheese, yogurt)
• Egg shells
• Dark green vegetables (broccoli, kale, spinach)
• Small fish (salmon, sardines) and their bones
• Fortified foods (cereals, juices)

Calcium is crucial for:

• Building and maintaining strong bones and teeth
• Muscle function and contraction
• Nerve function and transmission
• Blood clotting and wound healing