Most plants, algae, and cyanobacteria perform photosynthesis; such organisms are called photoautotrophs. Photosynthesis is largely responsible for producing and maintaining the oxygen content of the Earth’s atmosphere, and supplies most of the energy necessary for life on Earth.

This process is called photosynthesis and is performed by all plants, algae, and even some microorganisms. To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight. for photosynthesis. Carbon dioxide enters through tiny holes in a plant’s leaves, flowers, branches, stems, and roots.

Fundamental processes such as photosynthesis, respiration, plant nutrition, plant hormone functions, tropisms, nastic movements, photoperiodism, photomorphogenesis, circadian rhythms, environmental stress physiology, seed germination, dormancy and stomata function and transpiration, both parts of plant water relations.

Plants create their own energy food, called glucose, through a process called photosynthesis. To carry out photosynthesis plants need four things: chloroplasts, light, water and carbon dioxide.

Plant growth and development relies on water for transpiration, photosynthesis, and respiration. The unique ability of water to regulate temperatures, dissolve molecules of life, and allow gas exchange, is essential for all life on earth.

Photosynthesis, respiration, and transpiration are the three major functions that drive plant growth and development (Figure 24). All three are essential to a plant’s survival.

An average size tree can provide enough wood to make 170,100 pencils! The first type of aspirin, painkiller, and fever reducer came from the tree bark of a willow tree! 85% of plant life is found in the ocean! Bananas contain a natural chemical that can make people feel happy!

Plants require light, water, nutrients, and CO2, but have varying adaptations to survive different periods of time without them.