D) Amphibia was considered to be the first to develop lungs
Travel thru the other cells
Answer:
Tertiary.
Explanation:
Primary structure of proteins refers to the order of amino acids that make up the protein. The heme is an nonprotein non-amino acid, so it is not involved at this stage.
Tertiary structure of proteins is the overall 3-D folding of the protein (it comes after secondary, which involves folding into a repeated pattern). The heme bonds to its correct position on the hemoglobin during this stage and helps in correct folding.
Four critters that are pollinators are
- Bumblebee
- Honeybee
- Rufous Hummingbird
- Flower fly
Hope this helps!