Answer:
DNA replication is the biological process of producing two identical replicas of DNA from one orginal DNA molecule.
DNA replication occurs when the DNA strands unzip and the orginal strands of DNA serve as a template for new nucleotides to join and form a new strand. In needs to occur because existing cells divide to produce new cells.
Answer: Segmented Worms
Explanation: Annelid worms have a interesting, segmented type of body.
(Sorry if this is incorrect, have a good day though!)
Answer: The upper chamber is called an atrium, or auricle, and the lower chamber is called a ventricle. The two atria act as receiving chambers for blood entering the heart; the more muscular ventricles pump the blood out of the heart.
In the geocentric model, the moon was its own planet, and it did not orbit the Earth. The geocentric model has any single planet out of proportion in relation to the surrounding planets (according to given diagram). The heliocentric model has the sun in the middle while the geocentric model has the Earth in the middle.