Transpiration refers to the process of water movement through a plant and its evaporation from aerial parts, especially leaves.

Ribosomes are the sites of protein synthesis in the cell.

The cell membrane is selectively permeable, allowing certain substances to pass while blocking others.

The somatic nervous system controls voluntary movements, making option 3 the correct answer.

Meat and dairy products are the best sources of Vitamin B12, which is important for nerve function and blood cell production.

Plants absorb carbon dioxide from the atmosphere during photosynthesis, which is then used to produce glucose.

Plants primarily take in carbon dioxide during photosynthesis, which is used to produce glucose.

Auxin is a plant hormone that promotes cell elongation and is crucial for growth.

Ethylene is a plant hormone that promotes the ripening of fruits and is involved in various aspects of plant growth and development.

Proteins are most important for muscle repair and growth as they provide the building blocks (amino acids) needed for muscle tissue.

Iron is crucial for oxygen transport as it is a key component of hemoglobin in red blood cells.

Iron is a key component of hemoglobin, which carries oxygen in the blood.

Nitrogen is a key component of chlorophyll and is essential for its synthesis, thus playing a crucial role in photosynthesis.

Proteins are essential for muscle repair and growth due to their amino acid content.

Proteins are essential for muscle repair and growth due to their role in building and repairing tissues.

Eggs are considered a complete protein source as they contain all essential amino acids.

Temperature is a key factor affecting the rate of photosynthesis, as it influences enzyme activity involved in the process.

The cell membrane regulates the entry and exit of substances, maintaining homeostasis within the cell.

The endoplasmic reticulum is involved in the synthesis of lipids and proteins.

The plasma membrane is selectively permeable, controlling the entry and exit of substances.

Photosynthesis produces glucose and oxygen as products, using sunlight, carbon dioxide, and water.

Vitamin C is a water-soluble vitamin, which means it dissolves in water and is not stored in the body.

The smooth endoplasmic reticulum is involved in lipid synthesis, detoxification, and calcium storage, but not protein synthesis.

Water is a small molecule and not classified as a macromolecule, while proteins, carbohydrates, and lipids are.

Iron is considered a micronutrient, while nitrogen, phosphorus, and potassium are macronutrients essential for plant growth.

Photosynthesis occurs in chloroplasts, where light energy is converted into chemical energy in the form of glucose.

DNA replication occurs in the nucleus, where the cell's genetic material is housed.

The nucleolus, located within the nucleus, is responsible for synthesizing ribosomal RNA.

The pancreas plays a role in digestion by producing digestive enzymes and also functions as an endocrine organ by producing insulin.

The small intestine is the main site for the absorption of nutrients from digested food.