Heterocyst-forming cyanobacteria differentiate highly specialized cells to provide fixed nitrogen to the vegetative cells in a filament. In the presence of a source of combined nitrogen such as nitrate or ammonium, Anabaena PCC 7120 grows as long filaments containing hundreds of photosynthetic vegetative cells.
A group of the same species, living together and breeding is known as option C. Population.
A species is regularly described because the maximum crucial agency of organisms in which any two human beings of the best sexes or mating sorts can produce fertile offspring. Species means a grouping of associated organisms constituting a scientific unit, occupying a very ordinary region in nature and fulfilling its functions in the preferred organic metabolism in the manner particular simplest for that grouping.
A population is tough and fast of comparable objects or sports which are of a hobby for a few query or experiment. A statistical population can be a set of current objects or a hypothetical and probably countless company of objects conceived.
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Disclaimer: your question is incomplete, please see below for the complete question.
A)community
B)kingdom
C) Population
hence, the answer is option C. Population
A) A flap in the heart located between each atrium and ventricle.
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Answer:
Organism D.
Explanation:
Amino acids are the monomers of proteins and are linked together by the peptide bond. The protein is obtained from the RNA molecules by the process known as translation.
The amino acid sequence of the proteins can also be used to study the evolutionary relationship between the organisms and the closeness of teh organisms with each other. In the question it is give that organisms A and D has least difference ( 1 amino acid sequence difference) and more related with each other.
Thus, the answer is organism D.
