DNA is an example of a complex biological polymer called a nuclei acid. Nucleic acids are made up of many smaller sub units called nucleotides. The components of a DNA nucleotide are deoxyribose, phosphate group, nitrogen group. There are four possible bases in a DNA molecules which includes adenine, cytosine, guanine and tymine.
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Explanation:
pollen grain sticks to the stigma, where the pollen build up a pollen tube to the ovule, after fertilization the ovary then builds up to develop into a fruit, depending of the the type of flower the fruit can be determined
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four types of nitrogen bases od DNA nucleotides are; Thymine, Adanine, guanine and cytosine
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CROSSING OVER is the exchange of segemetics of dna or genetic matierial between the members of the pairs of cromezones
