<span>1.
double helix model was proposed after getting the clue from chargaff rule
purines = pyramidines
2.
A = T ( this means A pairs with T)
G = C (this means G pairs with C)
A DNA strand with the sequence A-T-T-G-C-T is T-A-A-C-G-A
3.
In all the species the nucleic acid is made of phosphate , sugar , nitrogenous base (A,T,C,G)
only the number purines and pyrimidines vary.</span>
<span>The internal structue and phylogenetic relationships were not considered in early taxonomic classifications. Early classifications were mostly based on morphological characters like height, shape, color etc. The organisms have evolutionary relationships which were also not considered in earlier classifications.</span>
Answer:1..Binomial System
2..genus and species
Explanation:
Second option- because if there is too much of the owls, it will be imbalanced and the mouse population will go down
