The main purpose of sexual reproduction is to create genetic diversity, which can improve adaptability.

The acrosome contains enzymes that help the sperm penetrate the outer layers of the egg during fertilization.

The main purpose of the amniotic fluid is to protect the fetus by cushioning it from physical shocks.

The G1 phase is primarily for cell growth and preparation for DNA synthesis.

The main purpose of the menstrual cycle is to prepare the female body for potential pregnancy each month.

The S phase is specifically for DNA replication, ensuring that each daughter cell receives a complete set of chromosomes.

Biopesticides are used to reduce the reliance on chemical pesticides, promoting a more sustainable approach to pest management.

Genetically modified crops are primarily developed to improve resistance to diseases, pests, and environmental conditions.

The main reproductive structure of angiosperms is the flower, which facilitates reproduction through pollination.

Chlorofluorocarbons (CFCs) are the primary substances responsible for ozone layer depletion.

Chlorofluorocarbons (CFCs) are the primary substances responsible for the depletion of the ozone layer.

Glucose is the main substrate for respiration in plants, as it is broken down to release energy.

Malaria is primarily transmitted by the female Anopheles mosquito.

Malaria is primarily transmitted through the bite of infected female Anopheles mosquitoes.

The male gamete in flowering plants is called pollen, which is produced in the anthers of the stamen.

The male reproductive part of a flower is called the stamen, which consists of the anther and filament. The anther is the part that produces pollen.

Nucleotides are the monomers that make up nucleic acids.

The net gain of ATP from one molecule of glucose during aerobic respiration is approximately 30-32 ATP, depending on the efficiency of the process.

The net gain of ATP molecules from one molecule of glucose during aerobic respiration is approximately 30-32 ATP.

The normal pH range of human blood is tightly regulated between 7.35 and 7.45, which is essential for proper physiological function.

The normal pH range of human urine is typically between 6.0 and 7.0, indicating it is slightly acidic.

The normal respiratory rate for a healthy adult at rest is typically between 12 to 20 breaths per minute.

The outermost layer of a plant stem is called the epidermis, which protects the plant from environmental damage.

The outermost whorl of a flower is called the calyx, which is made up of sepals.

Normal human urine typically has a pH range of 6.0 to 7.0, which can vary based on diet and health.

The S phase (Synthesis phase) is where DNA replication occurs, resulting in the duplication of chromosomes.

The G1 phase is the first stage of interphase where the cell grows and prepares for DNA replication.

Asexual reproduction allows for rapid population increase as it does not require a mate.

Sexual reproduction leads to genetic diversity, which can enhance survival in changing environments.

Recombinant DNA technology is used to enhance crop yield, provide pest resistance, and improve nutritional value, making option 'All of the above' the correct answer.