Biology, 06.10.2019 00:30 andres2865
Which of these would be evidence that cyanobacteria evolved the ability to perform photosynthesis and released oxygen as a byproduct over 2 billion years ago? a) the presence of iron oxides (rust) in sedimentary rock layers that are 2 billion years old b) the presence of an iridium-rich layer in sedimentary rock dating from times of mass extinctions c) the presence of chloroplasts in fossilized eukaryotes from fossils dating from 2 billion years ago forward d) the formation of stromatolite rock structures from aggregates of cyanobacteria dating 3.5 billion years ago
Answers: 1
Biology, 21.06.2019 15:30
Which of the following are true about bacteria? select all that apply. bacteria are all around you. bacteria can or harmful. bacteria are multicellular organisms. bacteria can only be found on the human body.
Answers: 1
Biology, 21.06.2019 23:00
Explain how ancient whale fossils found in eqypt are believed to support the theory of evolution.
Answers: 1
Biology, 22.06.2019 03:40
Imagine you are introducing the lac operan and the trp operon to students who have never learned about it before. complete the table to compare the similarities and differences between the two operons
Answers: 3
Biology, 22.06.2019 08:40
What substance acts to prevent sudden ph changes in bodily fluids?
Answers: 2
Which of these would be evidence that cyanobacteria evolved the ability to perform photosynthesis an...
Mathematics, 27.08.2019 04:30
Mathematics, 27.08.2019 04:30
Mathematics, 27.08.2019 04:30
Social Studies, 27.08.2019 04:30
Mathematics, 27.08.2019 04:30
English, 27.08.2019 04:30
English, 27.08.2019 04:30
Mathematics, 27.08.2019 04:30
Biology, 27.08.2019 04:30
Mathematics, 27.08.2019 04:30
Social Studies, 27.08.2019 04:30
Mathematics, 27.08.2019 04:30