Question 1
In the phylogenetic tree below, which feature distinguishes snakes and mammals from frogs and salamanders?
◦ legs
◦ head
◦ amniotic egg
◦ milk
◦ notochord
Question 2
Messenger RNA (mRNA) is ________.
◦ the major structural material making up ribosomes
◦ the molecule that carries the genetic information from DNA and is used as a template for protein synthesis
◦ the major structural component of chromosomes
◦ a molecule that incorporates a specific amino acid into the growing protein when it recognizes a specific group of three bases
◦ the monomer of polypeptides