IMAT biology (centrioles)

While i was studying about Centrioles, i found this sentence that says " Centrioles are small organelles found in all animal cells but absent in many plants". Why is it saying ‘many plants’ instead of saying ‘all plant cells’? Aren’t Centrioles absent in all plant cells? Are there any exceptions to this?

Thank you


I’m not sure but i think at IMAT level we consider that only animals have centrioles. There are always exceptions in biology, for example there’s a single celled algae that can swim by beating its flagella thanks to centrioles, but this is much more advanced than the test.

Hope this helps!

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Got it! Thank you so much .

The statement “centrioles are small organelles found in all animal cells but absent in many plants” is somewhat imprecise, but it allows for exceptions. While centrioles are indeed absent in most plant cells, there are some lower plant species and certain specialized cells in plants where centrioles or centriole-like structures can be found.

For example, some algae and lower plant species, like mosses and ferns, have been known to contain centrioles or centriole-like structures in their cells. Additionally, some specific plant cells, such as the motile sperm cells of certain bryophytes (mosses and liverworts) and pteridophytes (ferns and horsetails), possess centrioles or similar structures that help organize the microtubules required for flagellar movement.

However, it is worth noting that these cases are exceptions and not the norm. The majority of higher plant cells, like those found in flowering plants (angiosperms) and gymnosperms, do not contain centrioles. Instead, they rely on other mechanisms and structures for processes like cell division and microtubule organization.


Thank you Ari. Thanks for helping me out.