Question

Acetabularia, a largest unicellular plant, belongs to
A. Chlorophyta
B. Rhodophyta
C. Pyrrophyta
D. Phaeophyta

Answer 1

Hint:-Acetabularia is called largest unicellular plant which is a genus of green algae and comes under the family of polyphysaceae, it is unicellular organism but larger in size and with complicated structure that has round leaves of a herbaceous flowering plant, is tall about 0.5 to 10 cm. It has three divisions that have short roots, with long middle stalks, and an umbrella at the top.

Complete step-by-step solution:-
As mentioned above Acetabularia acetabulum is a unicellular eukaryote, which is green colour algae. As it is green in colour it prepares food by photosynthesis and has chloroplast in it. Due to its larger size with single celled involved it is known as largest unicellular organism
Thus, the correct answer is option A. As it is huge in shape and has complex structure so it becomes more interesting to go through its structure in depth for better understanding in a single celled organism which is not usual. It transports its messenger RNA molecules towards its tip or axis in an inactive form where they are converted into proteins. This organism undergoes asexual reproduction. It has a unique feature that caps of two different Acetabularia can be exchanged even of two different species and if the stem is isolated with no nucleus, it can regrow in a separate Acetabularia.

Note:-
Asexual reproduction in Acetabularia involves its nucleus multiple rounds of mitosis division that results in many daughter nuclei and this all events take place under one nuclear membrane. In an experiment performed by Joachim Hammerling it was clearly stated that Acetabularia's genetic information is present in the nucleus.