Answer:
it is important to have a control in a experement because you need something to compare to and see the changes.
Explanation:
3- perform the functions of the cell
Answer: unicellular
Explanation: Euglena are unicellular organisms classified into the Kingdom Protista, and the Phylum Euglenophyta. All euglena have chloroplasts and can make their own food by photosynthesis.
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The respiratory and circulatory systems work with each other in this manner, the respiratory system will obtain oxygen then the circulatory system brings the oxygen to different parts of the body then it also takes carbon dioxide from different tissues of the body and bring carbon dioxide to lungs then the respiratory system takes carbon dioxide outside the body during exhalation
All words with a repeated letter are allowed. Green glass door, apple and ball.
