Answer:
In science, a variable is any item, factor, or condition that can be controlled or changed
Have a primitive digestive system
Enters the left atrium...this is the oxygenated blood from the lungs (pulmonary)
a~ shared characteristics are features or qualities that organisms or species have in common.
c~ shared characteristics can be characteristics that existed in the common ancestor and still exist in modern organisms.
d~ shared characteristics can be new characteristics that have been modified from what was found in the common ancestor.
i hope these are correct, if they aren't, i'm so sorry.
btw, i love your username!!
rose from blackpink? Imaoo :D~
Transcription takes place in three steps: initiation, elongation, and termination. The steps are illustrated in the Figure below. Initiation is the beginning of transcription. It occurs when the enzyme RNA polymerase binds to a region of a gene called the promoter.
