Answer:DNA has three types of chemical component: phosphate, a sugar called deoxyribose, and four nitrogenous bases—adenine, guanine, cytosine, and thymine. Two of the bases, adenine and guanine, have a double-ring structure characteristic of a type of chemical called a purine.
Explanation:
Radiation: is the emission or transmission of energy in the form of waves or particles through space or through a material medium.
Examples: Radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, and gamma radiation
Answer:
What causes genetic variation?
Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism’s offspring).
Explanation:
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Colorectal Cancer have these following symptoms or signs that a nurse should consider:1. Abnormality of bowel habits like constipation, diarrhea, and stool narrowing, lasting for more than few days2. Rectal bleeding of bright red blood3. Having blood in the stool and makes it look dark4. Abdominal pain5. Fatigue6. Sudden weight loss
The DNA is condensed before replication in the form of chromosomes and then the chromosomes are divided.
