Biology, 20.07.2019 09:30 angiebailey1605
According to scientific evidence, earth’s earliest atmosphere lacked oxygen. over time, oxygen was added to the atmosphere. which statements explain how this change occurred and how it affected life on earth? choose all answers that are correct. multiple a) photosynthesis was carried out as cyanobacteria evolved. oxygen is needed to carry out photosynthesis. b) oxygen is needed to carry out many life processes. the addition of oxygen to the earth's atmosphere assisted with the development of eukaryotic organisms. c) oxygen is needed to carry out many life processes. the addition of oxygen to the earth's atmosphere assisted with the development of the first prokaryotic organisms. d) photosynthesis was carried out as cyanobacteria evolved. oxygen is a product of photosynthesis.
Answers: 2
Biology, 21.06.2019 20:20
Which best describes an adaptation that could be found in a fish that lives in a slow-flowing stream? the ability to attract prey by glowingextra gills, for oxygen extractionthe ability to grow largerextra fat, for warmth
Answers: 2
Biology, 22.06.2019 01:20
Which of the following is not considered an appendage of the skin? nails glands follicles none of the above
Answers: 2
Biology, 22.06.2019 05:00
Idon’t know the answer and i’ve been stuck on it for a while now skskskskks
Answers: 1
Biology, 22.06.2019 06:30
Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?
Answers: 2
According to scientific evidence, earth’s earliest atmosphere lacked oxygen. over time, oxygen was a...
Mathematics, 07.10.2019 23:00
Mathematics, 07.10.2019 23:00
History, 07.10.2019 23:00
Mathematics, 07.10.2019 23:00
Mathematics, 07.10.2019 23:00
Mathematics, 07.10.2019 23:00
English, 07.10.2019 23:00
History, 07.10.2019 23:00
English, 07.10.2019 23:00
Physics, 07.10.2019 23:00
Health, 07.10.2019 23:00