I think it is a structure of:dim is light where the radial muscles of the iris contract
Circular muscles of the iris relax
Pupil dialates
More light enter the pupil
They can be observed in a microscope because both of them are very small to see. Mostly, they contain genetic material. Viruses need a host to keep it spreading or etc.
<span>Down syndrome
is a chromosomal condition that is associated with intellectual
disability, a characteristic facial appearance, and weak muscle tone
(hypotonia) in infancy. All affected individuals experience cognitive
delays, but the intellectual disability is usually mild to moderate.</span>
During transcription, the enzyme RNA polymerase (green) uses DNA as a template to produce a pre-mRNA transcript (pink). The pre-mRNA is processed to form a mature mRNA molecule that can be translated to build the protein molecule (polypeptide) encoded by the original gene.
