E) is photosynthetic C) is an anacrobic organism D) is a facultative anacrobe ev
ID: 151289 • Letter: E
Question
E) is photosynthetic C) is an anacrobic organism D) is a facultative anacrobe evolved? 43) Why is glycolysis considered to be one of the first metabolic pathways to have A) It produces much less ATP than does oxidative phosphorylation. B) It does not involve organelles or specialized structures, does not require oxygen, and is present in most organisms. C) It is found in prokaryotic cells but not in eukaryotic cells. D) It requires the presence of membrane-enclosed cell organelles found 44) Early investigators thought the oxygen produced by photosynthetic plants came from carbon dioxide. In fact, it comes from A) water B) glucose C) air D) electrons from NADPH 45) Every ecosystem must have A) autotrophs and heterotrophs B) producers and primary consumers C) photosynthesizers D) autotrophs iun nhotosynthetic pigment and the leaves of this plant appear to be reddish yellow. Itthir nioment?Explanation / Answer
43) Glycolysis is considered one of the first metabolic pathways to have evolved because it does not involve organelles or specialized structures, does not require oxygen and is present in most organisms. (B)
In the early days, there were no eukaryotes. There were only primitive cellular organisms called prokaryotes which had no membrane-bound organelles. The atmosphere was not as rich in oxygen as it is now. Hence, an early metabolic pathway would cater to these conditions.
44) The oxygen evolved during photosynthesis comes from water. This was determined by using radioactive methods.
45) Every ecosystem must have autotrophs and heterotrophs. (A) All the other options are also correct but this is the most accurate because it encompasses more components of the ecosystem.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.