R review

Photosynthesis

The process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll.

Cell Respiration

A set of metabolic reactions that convert biochemical energy from nutrients into ATP, and then release waste products.

Ecosystem

A biological community of interacting organisms and their physical environment.

Biodiversity

The variety of plant and animal life in a particular habitat or ecosystem.

Niche

The role or function of an organism or species within an ecosystem.

Food Chain

A linear sequence of organisms through which nutrients and energy pass as one organism eats another.

Habitat

The natural home or environment of an animal, plant, or other organisms.

Trophic Level

Each of the hierarchical levels in an ecosystem, comprising organisms that share the same function in the food chain.

Biotic Factors

Living components of an ecosystem, such as plants, animals, and microorganisms.

Abiotic Factors

Non-living chemical and physical components of the environment that affect living organisms.