Th recycling of chemical elements throughout an ecosystem is called a
energy
b
a trophic level
c
the phosphorus cycle
d
biogeochemical cycle

As a small change in a person's dna can cause a genetic disorder

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that

Which of these is not a nucleotide base found in dna?