Question

Incipient nucleus occurs in
A. Myxophyceae
B. Chlorophyceae
C. Phaeophyceae
D. Rhodophyceae

Answer 1

Hint: Some membrane bounded organelles like Mitochondria, Golgi complex present in which the genetic material is not properly bound to the nuclear membrane. And the cyanobacteria lacks membrane bound organelles present and it’s kind of unicellular organisms present in the prokaryotic cells.

Complete answer:
Cyanobacteria reserved in the part of eukaryotic organisms but actually known as bacteria and sometimes considered as a green algae. The cyanobacteria obtained from the process of photosynthesis but lack of membrane bound organelles and nucleus present in it.
Because of the genetic traits and similar structure green algae evolved into the first chloroplast and use unique pigments in the process of the chloroplast also known as phycobilins which looks like blue green color Cyanobacteria obtained very harmful blooms in the waterways, economically and in the public health sector’s and through the production of cyan toxins.
Some aquatic animals like snails, insects and zooplankton take oxygen as a byproduct of photosynthesis in the form of food. With the help of cyanobacteria we can obtain useful information regarding the health of aquatic ecosystems and productivity. They adversely affect water treatment and ecosystem health because some algae indicate very high nutrients levels and other sides show very low nutrients level.

Therefore the correct option is (A).

Note: Another name of the Myxophyceae is also known as cyanobacteria and also known as green algae. Some algal species are more beneficial in water bodies. Some green algae produce toxins that produce harmful effects on aquatic animals and some cyanobacteria produce taste and odor compounds, which can impart flavor to fish and make the taste of the water unpleasant.