Q:

What is the difference between a protozoa and a bacteria?

A:

Quick Answer

Bacteria and protozoa are very distantly related, with bacteria classified as prokaryotes and protists as eukaryotes. This means that protozoa are more closely related to humans than either is to bacteria. The two organisms are structurally distinct. Bacterial cells lack a nucleus, and protozoa contain organelles, such as mitochondria.

Know More
What is the difference between a protozoa and a bacteria?
Credit: JGI/Jamie Grill Blend Images Getty Images

Full Answer

Bacteria are generally smaller than protozoa, which frequently feed on bacteria. All protozoa "eat" by enveloping their prey within small pockets called vacuoles, while bacteria can absorb nutrients through their cell walls. Bacteria almost always reproduce via simple binary fission. While some protozoa also use this method, some split into more than two offspring, and some reproduce sexually.

Learn more about Biology

Related Questions

  • Q:

    How do protozoa move?

    A:

    Protozoa move by cell extension, flagella and cilia; the method of movement is determined by the type of organism and the surrounding environment. Protozoa are classified into three groups: ciliates, amoebae and flagellates. Ciliates move using tiny cilia, flagellates move through water using flagella as oars and paddles and amoeba crawl along surfaces by extending parts of their cells.

    Full Answer >
    Filed Under:
  • Q:

    Where do protozoa live?

    A:

    Protozoa live in seas, rivers, lakes, ponds, decaying matters and soil. Water is a requirement for their habitat and they can exist in diverse regions where this is present.

    Full Answer >
    Filed Under:
  • Q:

    Do prokaryotes have mitochondria?

    A:

    Prokaryotes do not have mitochondria. A prokaryote is a cell that does not contain membrane-bound structures called organelles. A mitochondrion is an organelle, but because prokaryotes do not have organelles, they do not have mitochondria.

    Full Answer >
    Filed Under:
  • Q:

    Which organisms are prokaryotes?

    A:

    All bacteria are classified as prokaryotes, and common examples include E. coli and Streptococcus. Archaea, which has similarities to bacteria, is another domain that exclusively features prokaryotes. Prokaryotes are single-celled organisms that lack a nucleus and membrane-bound organelles such as mitochondria, chloroplasts, a golgi apparatus or an endoplasmic reticulum.

    Full Answer >
    Filed Under:

Explore