<span>The answer is nitrogen. Plants cannot use atmospheric nitrogen directly. Nitrogen from the air must be converted into the different form so plants can absorb it. Thus plants need nitrogen-fixing bacteria to convert atmospheric nitrogen into ammonium, which is available for plants to absorb it. </span>
Answer : The correct answer for the blank is -
B. nitrogen bases.
DNA (deoxyribonucleic acid) is considered as the genetic material of living organisms and it is passed from one generation to the next generation.
It is composed of sequence of small units, called nucleotide that is primarily made up of three parts-
Nitrogenous base (adenine, thymine, cytosine, and guanine) phosphate group, and deoxyribose sugar.
One living organism is different from another because of the sequence of nucleotides (and thus sequence of nitrogen bases) present in their respective DNA strands.
DNA is first transcribed into mRNA (messenger RNA), which is then converted into particular protein (according to the nucleotide sequence).
The protien is responsible for specific traits in thr organsim.
Thus, option B) is the right answer.
Osteocytes is a bone cell formed when an osteoblast becomes embedded in the matrix it has secreted. So it would be that osteocytes secrete the matrix of Hanoverian canal.
Answer:
B) A school of sunfish.
In biology, a population is a number of all the organisms of the same group or species who live in a particular geographical area and are capable of interbreeding
Answer:
third option should be correct
Explanation: