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.
Answer : Passive transport mechanism
Explanation: Passive and Active transport mechanisms are the two types of transport mechanisms by which molecules move in and out of the cell membranes. Passive Transport mechanisms do not require energy from cells. The movement of the molecules from High to Low concentration requires no energy. E.g. Osmosis, simple and facilitated diffusion.
Explanation:
wings on butterflies, bats, and birds.
PH 3 is the most acidic while pH 5 is the most acidic.
The correct answer is all of them, none of the answers are actually air masses. This is a poorly worded trick question :)
I hope this helps!!
