Answer:
they likely evolved from the same ancestor
Explanation:
because they have similar features
Answer:
b., c., e. are the answers.
Purines have double rings, whereas pyrimidines have single rings.
Answer:
Oxygen is inhaled so that Dioxide can be exhaled, that is just how breathing functions.
Explanation:
We require this system for our survival.
Answer:
codon
Explanation:
A codon is a sequence of three DNA or RNA nucleotides that corresponds with a specific amino acid or stop signal during protein synthesis.
Answer:
having a genetically diverse population make a species more likely to survive a change to the enviroment because random mutations can occur in a species and if a sudden change in the environment were to occur like extreme heat for example, some of the mutations in their DNA may help them survive this extreme heat and the species will be more likely to survive
