instruction:
You are given a sentence and your task is to generate another sentence that supports the given input.
question:
The prokaryotic chromosome (its genome) is a single, circular, double stranded DNA molecule and has bidirectional replication which begins at the origin of replication.
answer:
In prokaryotes, a(n) genome is composed of a single, double-stranded dna molecule in the form of a loop or circle.

question:
Gamma radiation is generated by radioactivity, the decay of radioactive (unstable) atoms both in Earth's crust and in the atmosphere, and in reactions caused by cosmic ray collisions with atmospheric constituents, as well as by the decay of elementary particles produced by these collisions.
answer:
Radioactive atoms, nuclear explosions, and stars produce gamma rays

question:
A Human Heart, showing all four chambers
answer:
There are four chambers in the heart.