Question

Select the incorrect match w.r.t Shape of the chloroplast
a. Ulothrix – pyriform
b. Chlamydomonas – cup shaped
c. Zygnema – star shaped
d. Selaginella – discoid

Answer 1

Hint: Chloroplast is a type of plastid seen in the green plant tissues the chloroplast help in the photosynthesis process by synthesising the food the green colour of chloroplast is due to the pigments which has significant shapes. It can be Oval, star shape, Cup shape, ribbon shaped etc these shapes are different for different species containing the chloroplast.

Complete answer:
> Option A: Ulothrix – pyriform
Ulothrix is a filament us green algae found in marine or freshwater they have long filament us like structures which has seen in the low temperate regions the structure of earth re chloroplast is griddle shaped not pyriform shape because they are arranged for the proper reproduction are the motion.

> Option B: Chlamydomonas – cup shaped
Chlamydomonas is an algae called green algae because it contains the last number of chloroplasts in its arrangement. Chlamydomonas is mostly seen in the fresh water and the damp soil The chlamydomonas has a cell wall within a cell. The chloroplast in around within the cell chlamydomonas is almost oval shaped hence it looks like a cup shaped chloroplast.

> Option C: Zygnema – star shaped
Zygnema is a filament is algae mostly seen in the terrestrial areas it has huge muscle floating filaments which helps the algae to move quickly the shape of the Zygnema chloroplast is star shaped which is more or less like barrel shaped arranged access to the algae.

> Option D: Selaginella – discoid
Selaginella is a type of Moss with spike arrangement they undergo spore propagation and it is called as a non flowering plant with vascular tissues ,The chloroplast consists of sponge layer they are ellipsoid in shape which is also called as the discoid shape

Hence, the correct answer is option (A).

Note: Chloroplast in lower organisms such as algae helps them to synthesise their own food by absorbing the sunlight and converting into the chemical energy these are mostly unicellular organisms which do not have a developed arrangement within the cells to withstand extremes So the arrangement of chlorophyll within the cell and the shape of the chlorophyll inside the cells of the lower organisms shape of the chlorophyll inside the cells of the lower or the unicellular organisms is significant.