The major causes of death that account for the large differences in life exxpectancy between less developed and more developed countries are b. infectious and parasitic diseases.
Answer:
Explanation:
The diagram attached will help you and the answers can be taken from the picture
Polar bodies serve to eliminate one half of the diploid chromosome set in meiotic division in the egg, leaving behind a haploid cell. That means that 23 pairs (46) of chromosomes are going to be separated equally, 23 for the polar body and 23 for the egg cell. In case of trisomy 18, the division is not equal. Instead, the egg cell receives 23 +1 chromosomes and the polar body receives 23 - 1= 22 chromosomes.
That chromosome that was misplaced is the chromosome 18.
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A. can be used as an energy source by organisms.
DNA is made up of sugars and bases.
Fats are not glucose monomers. Carbohydrates are made up of glucose monomers.
