Explanation

• Breathing (respiration) is a process that requires energy.
• But it does not release energy.

The characteristics of the breathing process are:

• It is a physical process.
• It occurs in the respiratory system.
• It requires energy.
• Enzymes are not involved.

Explanation

The semi-digested food in a cockroach is temporarily stored in the crop.

The crop is an organ found in the digestive system of many insects, including cockroaches.

The crop allows insects to store food temporarily, which can be advantageous for survival in various environmental conditions.

Explanation

• The ear canal, also known as the external auditory canal.
• It is the tube that connects the outer ear to the middle ear.
• It transfers sound waves from the outer ear to the eardrum, which then transmits the vibrations to the middle ear.

Explanation

Water from domestic use is not a typical cause of air pollution.

Air pollution is typically caused by the release of harmful substances into the atmosphere, such as:

• Burning of fuel (transportation, industrial processes)
• Burning of solid waste (incineration, landfills)
• Coal (mining, combustion)

Explanation

Air pollution is caused by the release of harmful substances into the atmosphere, which can come in the form of:

• Solids (particulate matter, such as dust, soot, and smoke)
• Liquids (aerosols, such as mist and fog)
• Gases (carbon monoxide, nitrogen oxides, sulfur dioxide, and volatile organic compounds)

Explanation

• The embryo is the miniature plant inside a seed, consisting of the radicle (root), hypocotyl (stem), and cotyledon (seed leaf).
• It contains the structures that develop into the root, stem, and leaves of the new plant.

Explanation

• Warm-blooded vertebrates, also known as endothermic vertebrates.
• Warm-blooded are animals that maintain a constant body temperature, regardless of the temperature of their surroundings.
• They are able to generate heat internally and regulate their body temperature, allowing them to maintain a relatively constant body temperature.
• Examples: birds and mammals.

Explanation

Vertebrates are divided into two main groups based on temperature regulation:

1. Cold-blooded (ectothermic) vertebrates, which include: Fish, Amphibians and Reptiles
2. Warm-blooded (endothermic) vertebrates, which include: Birds and Mammals (including humans)

Explanation

• Bacteria are unicellular organisms.
• They have cell wall but don't have proper nucleus.
• It doesn't contain chlorophyll.
• It is used to make medicines, yogurt and cheese.
• Algae are unicellular with proper cell wall and nucleus.
• It contain chlorophyll.
• It causes diseases: Cutleria, Ulva and Volvox.

Explanation

Urate crystals, commonly associated with gout, do not cast a shadow in plain X-rays

Because they are radiolucent.

Bone, metal, and calcified lymph nodes are radiopaque and will cast shadows on X-rays.