Biology, 25.09.2019 06:30 cupkakekawaii45
Q: a: recent work in classification of life on earth has shown that what were once called prokaryotes are much more diverse than ever suspected. the prokaryotae are now divided into two domains, the eubacteria and the archaeabacteria, as different from each other as either is from the eukaryota. one organism, the blue-green algae or cyanobacteria, has left a fossil record that dates back nearly 3.5 billion years and is among the oldest fossils known. these blue-green algae had cell walls and were photosynthetic. a few hundred years ago, this organism was classified as a plant, then as a protist. today it is classified in the eubacteria because it a) is prokaryotic. b) is photosynthetic. c) is the ancestor of land plants. d) has cell walls and chloroplasts.
Answers: 1
Biology, 22.06.2019 16:30
Why do mountaineers become breathless as they reach high altitudes
Answers: 1
Biology, 22.06.2019 17:30
High blood pressure occurs when there is too much blood flowing through the blood vessels at one time. by changing the amount of water in the blood, blood pressure can change. the excretory system can to lower blood pressure.which would most likely occur in the kidney? a)more water would be transferred from the nephron.b)less water would be absorbed into the nephron.c)the amount of water in the bladder would decrease.d)the amount of water in the blood would increase.
Answers: 2
Biology, 22.06.2019 20:30
Tay-sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very large, complex, undigested lipids. which cellular organelle must be involved in this condition?
Answers: 3
Q: a: recent work in classification of life on earth has shown that what were once called prokaryo...
Computers and Technology, 23.11.2019 01:31
Computers and Technology, 23.11.2019 01:31