Petals are often brightly colored and serve to attract pollinators to the flower.

Reproduction ensures the continuation of a species by producing offspring.

Reproductive health education aims to inform individuals about safe practices, including the prevention of sexually transmitted diseases.

Recombinant DNA technology is used to create vaccines, produce antibiotics, and synthesize hormones like insulin.

Restriction enzymes are proteins that cut DNA at specific sequences, which is essential for cloning and genetic engineering.

Brittleness is primarily due to high atomic bonding energy, which prevents the material from deforming plastically.

The increase in human population is attributed to a combination of increased birth rates, decreased death rates, and improved healthcare.

Plastic deformation occurs when the material is subjected to stress beyond its yield strength.

The stability of a nucleus is primarily determined by the ratio of neutrons to protons, which affects the balance of forces within the nucleus.

Auxins inhibit the growth of lateral buds, maintaining apical dominance and directing growth towards the apex.

Gibberellins promote enzyme production that breaks down stored food in seeds, facilitating germination.

Potassium plays a crucial role in water regulation and osmotic balance in plants, helping to maintain turgor pressure.

Root hairs increase the surface area for water absorption from the soil.

Synovial fluid lubricates the joint, reducing friction and allowing for smooth movement.

The cytoskeleton provides structural support, helps maintain cell shape, and facilitates cell movement.

The spinal cord transmits signals between the brain and the rest of the body, playing a crucial role in reflex actions.

Tendons connect muscles to bones, allowing for movement when muscles contract.

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

White blood cells are crucial for the immune response, helping to defend the body against infections and foreign invaders.

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

The small intestine is the primary site for the absorption of nutrients due to its large surface area.

The stomach is the primary site of protein digestion, where pepsin begins the breakdown of proteins.

The primary site of respiration in plant cells is the mitochondria, where ATP is produced through cellular respiration.

Sunlight is the primary source of energy for most ecosystems, as it drives photosynthesis in plants.

Solar energy is the primary source of energy for most ecosystems, driving photosynthesis in plants.

Solar energy is the primary source of energy for photosynthesis, driving the process.

The primary source of energy for the Earth is solar energy, which drives weather, climate, and photosynthesis.

Mutation is the primary source of genetic variation in a population, as it introduces new alleles into the gene pool, which can then be acted upon by natural selection.

Mutations are the primary source of genetic variation, providing the raw material for evolution.

Industrial processes, especially those involving the burning of fossil fuels, are the primary source of sulfur dioxide emissions.