Explanation

• Carbon Dioxide (CO2) is the gas used to produce energy in the form of glucose during photosynthesis.
• CO2 is the source of carbon atoms, which are used to synthesize glucose and other organic compounds during photosynthesis.

Explanation

• The olfactory bulb is the part of the brain that receives signals from odor receptors in the nose.
• It processing information about smells and odors.

Explanation

• The optic nerve is the nerve that carries visual information from the retina to the brain.
• Where it is interpreted and understood.
• It is responsible for transmitting electrical signals from the photoreceptors in the retina to the brain.
• It allowing us to see and interpret visual information.

Explanation

• The lens is responsible for refracting (bending) light to focus it onto the retina.
• It changes shape to adjust the focal length, allowing the eye to focus on objects at varying distances.
• This enables all light rays entering the eye to meet at a single point on the retina, creating a clear image.

Explanation

• Chromosomes are thread-like structures in the nucleus that carry genetic information in the form of DNA.
• They contain the instructions needed to build and maintain the cell, and control its functions.

Explanation

The spinal canal is not a derivative of the ectoderm.

It is formed from the mesoderm during embryonic development.

The ectoderm gives rise to structures such as:

•  the skin
• nervous system (including the brain and spinal cord)
• tooth enamel

Explanation

Wolf is a tertiary consumer because it eats both primary consumers (mice) and secondary consumers (cats).

Explanation

The amount of protein for a healthy child aged 7-14 is approximately:

• 1g per kilogram of body weight for children with minimal activity
• 1.3g per kilogram of body weight for children completing moderate levels of exercise
• 1.6g per kilogram of body weight for children carrying out intense exercise

Explanation

• Copper mineral builds red blood cells.
• It is also involved in the building of bones.

Note: According to Sindh Textbook Board, Jamshoro

Explanation

• Fats are not found in vegetables.
• Most vegetables are primarily composed of carbohydrates, water, and fiber, with very small amounts of fat.