Measuring Species Diversity Environmental scientists are often interested in evaluating both species richness and species
evenness, so they have come up with indices of species diversity that take both measures into
account. One commonly used index is Shannon's index of diversity. To calculate this index, we must
know the total number of species in a community (n) and, for each species, the proportion of the
individuals in the community that represent that species (p). Once we have this information, we can
calculate Shannon's index (H) by taking the product of each proportion (p) and its natural logarithm
[In (P) and then summing these products, as indicated by the summation symbol (2):
H=-
SpIn (P)
Σ

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.