Question

Which of the following characters of Nostoc resembles other prokaryotes
A) Absence of definite nucleus
B) Ability to fix nitrogen
C) Multiplication by fission
D) All the above

Answer 1

the correct answer is option c

Answer 2

Answer:

The correct answer is A) Absence of definite nucleus

Explanation:

Prokaryotes exist in organisms whose cells lack a nucleus and other organelles. Prokaryotes are divided into two different groups: bacteria and the archaea, which scientists believe have special evolutionary lineages. Most prokaryotes are small, single-celled organisms that contain a relatively simple structure.

Nostoc exists in unicellular cyanobacteria. They include a prokaryotic cell. They are autotrophic and accomplish photosynthesis. They are competent in nitrogen-fixing and create a symbiotic connection with specific bryophytes. They possess differentiated cells known as heterocyst's, which function as nitrogen fixation.

The correct answer is A) Absence of definite nucleus.

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