The answer to this question would be...
B. Thousands
If you go to webpage <span>http://www.shapeoflife.org/2d-animal-cells-have-many-thousands-genes it will give you the same answer if you read through it.
Hope this helps a lot, leave a rating and like if it did!</span>
Answer:
after nutrients are absorbed during digestion,the excretory system removes faeces through the rectum. these work together to maintain oxygen homeostasis.
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