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What is an organism?

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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.

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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.

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    What is an aerotolerant anaerobe?

    A:

    An aerotolerant anaerobe is an organism that tolerates the presence of oxygen but does not require it for growth. Instead, aerotolerant anaerobes use fermentation to survive. An example organism is lactobacillus, a bacteria that lives in the gut of humans and is also used in the production of yogurt.

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    What do organisms need for survival?

    A:

    To survive, an organism needs a habitat that features somewhere to attract mates and find resources, has food, and protects it from the weather and extreme temperatures. The specifics of what an organism needs to survive varies between species, and many must adapt to environments to thrive.

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    Why do living things require energy?

    A:

    Every living organism, animals and plants, need a continual supply of energy to perform the processes necessary for reproduction and survival. Some of the processes like metabolism occur continually, while others only occur at certain times, like muscle contractions and cellular movements.

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    Why is cytoplasm important?

    A:

    As explained at About, cytoplasm is important because it transports materials throughout the cell of an organism. Cytoplasm is also responsible for dissolving wastes within a cell.

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