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14. Star clusters are held together by gravity. It really depends how old a star in the cluster is - it could be just born, or could have been born hundreds of billions of years ago. Astronomers categorize them by different colors, temperatures, sizes, brightness, etc.
15. Open clusters eventually disperse to form field stars.
16. Our sun is not part of a cluster (although it used to be).
17. Globular clusters<span> </span>are<span> found in the ring of a galaxy and usually contain more stars and </span>are<span> much older than the </span>open clusters.
18. Omega Centuari and M13.
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Answer:
10% of an animals energy gets gained as you move up the food chain. the rest of that (the 90%) is used for metabolic processes or given off to the environment as heat.
Explanation:
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Answer: cells
An organism is a life form consisting of one or more cells.
Answer:
Similarity: Both exocytosis and endocytosis are in the process of transporting huge molecules, a makeup of different atoms, across the membrane using a vesicle and needs energy.
Difference: Endocytosis brings materials into the cell, while exocytosis takes materials out.
Explanation:
