We need blood because it carries oxygen and helps us sustain life. The organ that pushes blood through the body is the heart.
RNA is a copy of DNA that is used to make proteins. We usually compare all eukaryotic cells as a group to all prokaryotic cells.
Answer:
hii can u PLZ put up the picture so that I can help u with this.Have a great day or night
Answer:
Index Fossils can be used to identify a specific time period.
Explanation:
