Geographic Isolation Because i had bio last year an i remember that Exact Question
Flatworms has the least complex body plan
Adenine and guanine have a fused-ring skeletal structure derived of purine, hence they are called purine bases. ... Similarly, the simple-ring structure of cytosine, uracil, and thymine is derived of pyrimidine, so those three bases are called the pyrimidine bases.
I think its the sunflower family
if i am wrong please tell me!
