The arrangement of microtubules in a centriole is .......

In which of the following organisms are centrioles found?

How many microtubule triplets are arranged in the peripheral area of a centriole?

Which structure is present in animal cells but absent in plant cells?

Microtubules are found in the structure of which of the following?

Which is correct for centriole function in animal cell?
$(I)$ Formation of bipolar spindle
$(II)$ Formation of lysosome
$(III)$ Formation of mesosome
$(IV)$ Formation of ribosome