Root hairs increase the surface area of roots, enhancing the plant's ability to absorb water and nutrients from the soil.

The cell membrane regulates what enters and exits the cell, maintaining homeostasis.

The circulatory system is responsible for transporting nutrients, oxygen, and waste products throughout the body.

The primary function of the digestive system is to break down food and absorb nutrients, making option 1 the correct answer.

The integumentary system, which includes the skin, hair, and nails, serves to protect the body, regulate temperature, and provide sensory information.

Mitochondria are known as the powerhouse of the cell, where cellular respiration occurs to produce ATP.

The primary function of the respiratory system is to exchange gases, specifically to take in oxygen and expel carbon dioxide.

Ribosomes are the cellular structures responsible for synthesizing proteins by translating messenger RNA (mRNA).

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

Red blood cells are primarily responsible for transporting oxygen from the lungs to the body's tissues.

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

Carbohydrates are the primary source of energy in a balanced diet, providing 4 calories per gram.

Using Bayes' theorem, P(Disease|Positive) = (P(Positive|Disease) * P(Disease)) / P(Positive). Here, P(Positive) = P(Positive|Disease) * P(Disease) + P(Positive|No Disease) * P(No Disease). Calculating gives approximately 0.018.

The prevalence of the disease is given as 2%, which can be expressed as a probability of 0.02.

Transpiration is the process where water vapor is lost from the plant, primarily through stomata in the leaves.

Transpiration is the process of water vapor loss from plant leaves, which helps in nutrient transport and temperature regulation.

Transpiration is the process through which water vapor is lost from the plant to the atmosphere, primarily through stomata.

The recommended daily intake of fiber for adults is 25-30 grams to maintain digestive health.

The recommended daily intake is 5-7 servings of fruits and vegetables for optimal health.

The recommended daily intake of fruits and vegetables for adults is 5-7 servings to ensure adequate nutrient intake.

The recommended daily intake of protein for an average adult is about 50 grams.

Antioxidants play a role in cell protection by neutralizing free radicals that can cause cellular damage.

Auxins are plant hormones that promote cell elongation, which is crucial for growth and development in plants.

Enzymes act as catalysts that lower the activation energy required for biochemical reactions, thus speeding them up.

Ribosomes are the sites of protein synthesis, translating mRNA into polypeptide chains.

The circulatory system's role is to transport nutrients, oxygen, and hormones to cells and remove waste products.

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

The Golgi apparatus modifies, sorts, and packages proteins for secretion or use within the cell.

The respiratory system is responsible for the exchange of gases, primarily oxygen and carbon dioxide, between the body and the environment.

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