Answer:
Like questions 16-20? there aren't any questions to be answered.
Explanation:
Please attach something to this question.
Its B.
becuase the radiation forms the ultra violet radiation and absobs it.
The reason why nost scientists thought that the first true cells formed on Earth were anaerobic is being shown in the second option :B. because there was no oxygen on early Earth. Paying attention to this fact scientists discovered that first cells were prokaryotes and greatest part of them created oxygen as a toxic by-product of their own metabolism which make them understand how the planet was provided with oxygen and made a conclusion that first cells were anaerobic.
Answer:
All—yeast, euglena, and paramecium—exhibit heterotrophic mode of nutrition.
Explanation:
Yeast needs to feed on subtrates (or substances) like sugars, euglena can make its food like plants do and also feeds on other food sources, while paramecium feeds on bacteria often.