Answer:
The sister chromatids are identical to one another and are attached to each other by proteins called cohesins. They are formed.
Explanation:
Transcription is the first part of protein synthesis and translation is the second part. The process you are looking for is translation.
Its the letter B because its the circulatory system
Answer:
To turn sugars into energy
Explanation:

- Mitochondria are main sites of aerobic respiration. They are miniature biochemical factories where food stuffs are completely oxidised to carbon dioxide and water.
- The energy (ATP) produced in the mitochondria helps to perform various energy requiring processes.
- Because of the formation of ATP in mitochondria it is called power house of the cell.

- Photosynthesis: Light reaction (in thylakoids), Dark reaction (in stroma).
- Storage of starch.