The stigma is the sticky part of the pistil that captures pollen.

Petals are usually the most colorful part of the flower, aiding in attracting pollinators.

The right atrium receives deoxygenated blood from the body through the superior and inferior vena cavae.

The small intestine is the primary site for nutrient absorption due to its large surface area and presence of villi.

The epididymis is the part of the male reproductive system that stores and matures sperm.

The glomerulus is the part of the nephron where blood filtration occurs, allowing water and small solutes to pass into the renal tubule.

The glomerulus is the part of the nephron where blood filtration occurs, leading to the formation of filtrate.

The proximal convoluted tubule is responsible for the majority of nutrient reabsorption, including glucose, amino acids, and ions.

The proximal convoluted tubule is responsible for the majority of reabsorption of water, ions, and nutrients.

The sympathetic nervous system is responsible for the 'fight or flight' response, preparing the body for action.

Dendrites are the extensions of a neuron that receive signals from other neurons.

The axon is the long projection of a neuron that transmits impulses away from the cell body.

The axon is responsible for transmitting impulses away from the cell body to other neurons or muscles.

Dendrites are the parts of the neuron that receive signals from other neurons.

The axon is the part of the neuron that transmits impulses away from the cell body to other neurons or muscles.

Leaves are the primary sites of photosynthesis in flowering plants due to the presence of chlorophyll.

Leaves are the primary site of photosynthesis in flowering plants due to the presence of chlorophyll.

Alveoli are tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide occurs.

The alveoli are tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide occurs.

The alveoli are tiny air sacs in the lungs where the majority of gas exchange occurs between air and blood.

The anther is the part of the stamen that produces and contains pollen.

Anaphase follows metaphase, where sister chromatids are pulled apart to opposite poles of the cell.

Mitosis is the phase of the cell cycle where the nucleus divides, resulting in two nuclei.

The G2 phase is where the cell prepares for mitosis, ensuring all DNA is replicated and the cell is ready to divide.

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

All of these plant groups exhibit alternation of generations, where both haploid (gametophyte) and diploid (sporophyte) stages are present.

Pteridophytes reproduce through spores, which are produced in sporangia.

Auxins are responsible for maintaining apical dominance by inhibiting the growth of lateral buds.

Ethylene is the hormone responsible for the ripening of fruits and is produced in response to various stimuli.

Abscisic acid is known for its role in stress responses, particularly in drought conditions.