How does energy move in a healthy ecosystem from the sun to the plants and the animals?

B Sun produces to the plant and animal and

Six amino acids have side chains that are polar but not charged. these are serine (ser), threonine (thr), cysteine (cys), asparagine (asn), glutamine (gln), and tyrosine (tyr). these amino acids are usually found at the surface of proteins, as discussed in the proteins 2 module.

Covalent bond is the correct answer