Q:

What is an organism?

A:

An organism is a living entity composed of many interrelated components that work together to achieve a common goal. Organisms come in a wide variety of sizes, shapes and lifestyles, but they all share some similar traits. All organisms require food and excrete waste, grow, reproduce and, ultimately, die.

Animals are the most obvious types of organisms. Animals are the most mobile and active of the organisms, and they include such species as humans, sharks and ants. Each has evolved survive in their particular niche.

Plants are one of the largest groups of organisms, and they form an important part of the food chain. Plants are called “the producers” of the living world, as they harness sunlight and turn it into a form of chemical energy. Called photosynthesis, this process enables the entire food chain to function.

Bacteria are some of the most numerous organisms, as they live on virtually every surface on planet Earth. Bacteria are very simple organisms, and their direct ancestors may have been some of the earliest forms of life. Many bacteria are beneficial and necessary for life, while others can be very harmful. Other types of organisms include protozoa, algae and fungi. Scientists disagree over whether viruses are organisms.

Learn More

Related Questions

  • Q:

    What are the five kingdoms of living things?

    A:

    The five kingdoms of living things are Monera, Protista, Fungi (or Mycota), Plantae (or Metaphyta) and Animalia (or Metazoa). The kingdom is the third taxonomic rank in the biological classification system.

    Full Answer >
    Filed Under:
  • Q:

    What is the purpose of a phospholipid bilayer?

    A:

    The phospholipid bilayer's function is to maintain a barrier between the cell and its external environment and to store and transport a variety of proteins that are essential to the cell's function. It controls what enters and exits the cell.

    Full Answer >
    Filed Under:
  • Q:

    What is the structure of fungi?

    A:

    Fungi are structured in filaments called hyphae, which are made up strings of cells and separated from one another by septa or crosswalls. Many of these hyphae grouped together make up mycelium.

    Full Answer >
    Filed Under:
  • Q:

    What happens when we inhale and exhale?

    A:

    The process of breathing performs a number of important gas exchanges through inhalation and exhalation. When someone inhales, they contract and move their diaphragm, which allows the lungs to expand. This is a part of the process needed to psychically suck in the air. When a person exhales, the diaphragm relaxes and the movement is undone. This allows air to be gradually pushed out of the lungs.

    Full Answer >
    Filed Under:

Explore