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romanna [79]
3 years ago
9

Once an egg has been fertilized: multiple choice

Biology
2 answers:
Taya2010 [7]3 years ago
5 0

a mature egg is fertilized when it is joined with a sperm cell

the answer is B

Papessa [141]3 years ago
5 0
The answer is A: A zygote is formed
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How do the respiratory and excretory systems work together to help people grow and survive
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respiratory and excretory systems are among the two vital systems in our body which work in order to maintain our health or keep our body fit

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Respiratory systems comprises of organs like lungs to inhale oxygen and exhale carbon dioxide out of our body. The oxygen is then mixed with blood by the heart and reaches different parts of our body.

Excretory system is responsible for excreting or expelling the waste out of our body to keep our body free from toxins and harmful chemicals.

excretory system works with respiratory system to get rid of water vapors and carbon dioxide in the human body.

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