Number of carriers = 5% of 2000 = 0.05 × 2000 = 100.

The cross Bb x Bb results in 1 BB (black), 2 Bb (black), and 1 bb (white), giving a phenotypic ratio of 3:1.

Using the Hardy-Weinberg principle, if 64% are black (BB or Bb), then 36% are white (bb). The frequency of b is √0.36 = 0.6.

Number of patients reporting fatigue = 60% of 150 = 0.6 × 150 = 90.

Expected number of patients reporting fatigue = 50 × 0.6 = 30.

Number of patients with the symptom = 60% of 150 = 0.6 × 150 = 90.

Expected improvement = 80% of 50 = 0.8 × 50 = 40 patients.

Expected male patients = 70% of 400 = 0.7 * 400 = 280.

One gram of fat provides approximately 9 calories, making it the most energy-dense macronutrient.

Chlorophyll is the pigment in plants that absorbs sunlight, which is essential for photosynthesis.

Chloroplasts are the organelles in plant cells where photosynthesis occurs, converting light energy into chemical energy.

Mitochondria are known as the powerhouses of the cell, generating ATP through cellular respiration.

Phloem is responsible for the transport of food, particularly the sugars produced during photosynthesis, from the leaves to other parts of the plant.

The immune system protects the body against infections and diseases by identifying and destroying pathogens.

Lysosomes contain enzymes that break down waste materials and cellular debris.

The skeletal system provides structure and protection for internal organs, making option 2 the correct answer.

The main function of dietary fats is energy storage, providing 9 calories per gram.

Dietary fiber promotes digestion by aiding in the movement of food through the digestive tract.

The main function of dietary fiber is to promote digestive health by aiding in bowel regularity.

Fats serve as a major source of energy storage in the body, providing 9 calories per gram.

Red blood cells are primarily responsible for transporting oxygen from the lungs to the rest of the body, making option 2 the correct answer.

The digestive system breaks down food into nutrients, which are then absorbed into the bloodstream for energy.

The main product of photosynthesis is glucose, which serves as an energy source for the plant.

The Calvin cycle produces glucose as its main product, using carbon dioxide and energy from ATP and NADPH.

Xylem is responsible for the transport of water and dissolved minerals from the roots to the rest of the plant.

Antioxidants help prevent oxidative stress by neutralizing free radicals in the body.

The cell wall of plant cells is primarily made of cellulose, providing structural support.

The primary function of carbohydrates in the body is to provide energy, especially for the brain and muscles.

The primary function of dietary fats is energy storage, providing 9 calories per gram.

Fats primarily serve as energy storage, providing 9 calories per gram.