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Whitepunk [10]
3 years ago
7

How do scientists say endosymbiosis happened?

Biology
1 answer:
elixir [45]3 years ago
6 0

Answer:The endosymbiotic theory is how scientists think mitochondria and chloroplasts evolved in eukaryotic organisms.

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You are examining a substance found at a crime scene. Using a chemical test, you are able to determine that glycogen is present
kondaur [170]

Answer:

a. The substance is from an animal source.

Explanation:

Glycogen is a carbohydrate polymer in which animals store their excess glucose as. When animals digest their ingested food, it gets broken down into GLUCOSE. This glucose, when in excess, gets stored as GLYCOGEN.

According to this question, a substance found at a crime scene is being examined using chemical tests. The test revealed that glycogen is present in the substance. This can mean that the substance is from an ANIMAL source because GLYCOGEN is only present in animals.

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3 years ago
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Qual é a principal função da célula biliar?
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3 years ago
Which best describes stem cells
g100num [7]
We need options :) but stem cells are a amazing type of cells that are able to develop into many different types of cells <span>First, they are unspecialized cells capable of renewing themselves through </span>cell division<span>, sometimes after long periods of inactivity. Second, under certain physiologic or experimental conditions, they can be induced to become tissue- or organ-specific cells with special functions. In some organs, such as the gut and bone marrow, stem cells regularly divide to repair and replace worn out or damaged tissues. In other organs, however, such as the pancreas and the heart, stem cells only divide under special conditions.</span>
7 0
3 years ago
What is the impact of our energy usage on the earth system ?
bogdanovich [222]
All energy sources have some impact on our environment. Fossil fuels—coal, oil, and natural gas—do substantially more harm than renewable energy sources by most measures, including air and water pollution, damage to public health, wildlife and habitat loss, water use, land use, and global warming emissions.
3 0
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Cells in a large multicellular organism communicate with each other by chemical signals. These signals are passed from one cell
VladimirAG [237]

Answer:

Cells in a large multicellular organism communicate with each other by chemical signals. These signals are passed from one cell to another. To receive and respond to a chemical signal, a cell must have a <u><em>receptor</em></u> for that chemical.

Explanation:

To generate a physiological response, all cells in the body have special proteins called receptors. These receptors are involved in detecting a chemical signal and generating a response. The receptors are specific for different kind of chemical signals. For example, a dopamine receptor will bind a dopamine molecule whereas an insulin receptor will be able to bind an insulin molecule. Apart from chemical signals, some cells might also respond to mechanical signals.

7 0
3 years ago
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