The proteorhodopsin protein consists of a single polypeptide chain. what is the highest level of structure possible in this protein?

Tertiary  structure

The highest level of structure possible in this protein is tertiary structure.

Tertiary structure is the final three dimensional shape of a protein. The protein tertiary structure is made up of a single polypeptide chain which serves as the backbone, with one or more protein secondary structures. The tertiary structure is mainly held together by interactions between the R groups of the amino acids that make up the protein.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.

it’s

explanation: