Symmetry found in $Volvox$ is

The classification of animals is $NOT$ based on which of the following?

Assertion $A$: Annelids and Arthropods exhibit bilateral symmetry.
Reason $R$: In Annelids and Arthropods,the animal body is divided into equal parts along radial directions.
Which option is correct for Assertion $A$ and Reason $R$?

They do not perform photosynthesis and primarily obtain nutrition through ingestion.

Assume that a pencil box held in your hand represents a plant cell. In how many possible planes can it be cut? Indicate these cuts with the help of line drawings.

The response to external stimulus is quicker and more precise in which of the following symmetry?