Answer:
you can miss all 20 if that is what you are asking
Explanation:
I believe it’s carbon dioxide, because you use your respiratory system to breathe in oxygen, and oxygen goes through your circulatory system. And you breathe out CO2.
A 'Trend' is a large social influence if this is what you are talking about. Trends are something where one person does/wears it (usually a popular person everyone likes) and then everyone else starts doing it.
Answer is C
Explanation
Obesity is a heterogenous condition and therefore cannot be considered a disorder.
Answer:Blood type is controlled by multiple forms of a single gene, while the length of corn ears is controlled by many different genes.
Explanation:
