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Three and a half billion years ago, Earth was much hotter than it is now, and there was little to no oxygen in the atmosphere. Based on these atmospheric conditions, which species originated 3.5 billion years ago?
bacteria
crawl through mud
Chloroplasts have DNA.
cell wall
The algae in the sunny pond will have a faster rate of cell division because they receive more sunlight.
unicellular bacteria
They provide the body with a safe antigen that allows the body to then prepare antibodies if it is ever exposed to the real v
Earth's atmosphere 3.5 billion years ago contained very little to no oxygen.
Microfossils of single-celled prokaryotic organisms have been found in rocks that are at least 3.5 billion years old. What led to the conclusion that single-celled prokaryotic organisms evolved in the absence of oxygen?
bacteria
crawl through mud
Chloroplasts have DNA.
cell wall
The algae in the sunny pond will have a faster rate of cell division because they receive more sunlight.
unicellular bacteria
They provide the body with a safe antigen that allows the body to then prepare antibodies if it is ever exposed to the real v
Earth's atmosphere 3.5 billion years ago contained very little to no oxygen.
Which statement supports the theory that chloroplasts evolved from cyanobacteria?
bacteria
crawl through mud
Chloroplasts have DNA.
cell wall
The algae in the sunny pond will have a faster rate of cell division because they receive more sunlight.
unicellular bacteria
They provide the body with a safe antigen that allows the body to then prepare antibodies if it is ever exposed to the real v
Earth's atmosphere 3.5 billion years ago contained very little to no oxygen.
A group of biology students wanted to know more about the growth of algae in local ponds. They studied algae living in a sunny pond and algae living in a shady pond. How will the rate of cell division MOST LIKELY differ between the algae?
bacteria
crawl through mud
Chloroplasts have DNA.
cell wall
The algae in the sunny pond will have a faster rate of cell division because they receive more sunlight.
unicellular bacteria
They provide the body with a safe antigen that allows the body to then prepare antibodies if it is ever exposed to the real v
Earth's atmosphere 3.5 billion years ago contained very little to no oxygen.
Which structure of a diatom is rich in silicon?
bacteria
crawl through mud
Chloroplasts have DNA.
cell wall
The algae in the sunny pond will have a faster rate of cell division because they receive more sunlight.
unicellular bacteria
They provide the body with a safe antigen that allows the body to then prepare antibodies if it is ever exposed to the real v
Earth's atmosphere 3.5 billion years ago contained very little to no oxygen.
A patient's blood is tested, and the substance found in the blood is living, microscopic, and responsible for the patient's tuberculosis. Which substance is making the patient ill?
bacteria
crawl through mud
Chloroplasts have DNA.
cell wall
The algae in the sunny pond will have a faster rate of cell division because they receive more sunlight.
unicellular bacteria
They provide the body with a safe antigen that allows the body to then prepare antibodies if it is ever exposed to the real v
Earth's atmosphere 3.5 billion years ago contained very little to no oxygen.
How do immunizations help fight the polio epidemic?
bacteria
crawl through mud
Chloroplasts have DNA.
cell wall
The algae in the sunny pond will have a faster rate of cell division because they receive more sunlight.
unicellular bacteria
They provide the body with a safe antigen that allows the body to then prepare antibodies if it is ever exposed to the real v
Earth's atmosphere 3.5 billion years ago contained very little to no oxygen.
A dinoflagellate contains two flagella that work together and enable the dinoflagellate to perform which function?
bacteria
crawl through mud
Chloroplasts have DNA.
cell wall
The algae in the sunny pond will have a faster rate of cell division because they receive more sunlight.
unicellular bacteria
They provide the body with a safe antigen that allows the body to then prepare antibodies if it is ever exposed to the real v
Earth's atmosphere 3.5 billion years ago contained very little to no oxygen.
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