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Len [333]
3 years ago
11

Why was important for Miller and Urey to sterilized the apparatus to kill any bacteria in it?

Biology
1 answer:
Elena L [17]3 years ago
3 0

Answer:

The Miller–Urey experiment (or Miller experiment) was a chemical experiment that simulated the conditions thought at the time to be present on the early Earth, and tested the chemical origin of life under those conditions. The experiment supported Alexander Oparin's and J. B. S.

Explanation:

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How are unique daughter cells created in Meiosis? A. Mutation during Reduction Division B. Homologous Pairing C. Crossing Over D
GuDViN [60]

Answer:

the answer would be a mutation during reduction division

8 0
2 years ago
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A man is 1.7 m long. An amoeba is 17 um long. How does the length of the
Viktor [21]

Answer:

D. The man is one hundred thousand times larger than the amoeba.

Explanation:

one meter is equal to 1,000,000 micrometers.

(1.7m * 1,000,000)/17 = 100,000

4 0
3 years ago
How does carbon not get lost when it moves through the carbon cycle
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Answer:

Carbon is the chemical backbone of life on Earth. Carbon compounds regulate the Earth’s temperature, make up the food that sustains us, and provide energy that fuels our global economy. Carbon moves from one storage reservoir to another through a variety of mechanisms. For example, in the food chain, plants move carbon from the atmosphere into the biosphere through photosynthesis. They use energy from the sun to chemically combine carbon dioxide with hydrogen and oxygen from water to create sugar molecules. Animals that eat plants digest the sugar molecules to get energy for their bodies. Respiration, excretion, and decomposition release the carbon back into the atmosphere or soil, continuing the cycle. The ocean plays a critical role in carbon storage, as it holds about 50 times more carbon than the atmosphere. Two-way carbon exchange can occur quickly between the ocean’s surface waters and the atmosphere, but carbon may be stored for centuries at the deepest ocean depths. Rocks like limestone and fossil fuels like coal and oil are storage reservoirs that contain carbon from plants and animals that lived millions of years ago. When these organisms died, slow geologic processes trapped their carbon and transformed it into these natural resources. Processes such as erosion release this carbon back into the atmosphere very slowly, while volcanic activity can release it very quickly. Burning fossil fuels in cars or power plants is another way this carbon can be released into the atmospheric reservoir quickly.Human activities have a tremendous impact on the carbon cycle. Burning fossil fuels, changing land use, and using limestone to make concrete all transfer significant quantities of carbon into the atmosphere. As a result, the amount of carbon dioxide in the atmosphere is rapidly rising; it is already considerably greater than at any time in the last 800,000 years.  The ocean absorbs much of the carbon dioxide that is released from burning fossil fuels. This extra carbon dioxide is lowering the ocean’s pH, through a  process called ocean acidification. Ocean acidification interferes with the ability of marine organisms (including corals, Dungeness crabs, and snails) to build their shells and skeletons.

6 0
3 years ago
Manure is often used by gardeners to fertilize soil.How might this be effective in replenishing soil nutrients?
Svet_ta [14]
I don't know my mom use it but we also use leaves because she says that it help's our bushes grow?!
6 0
3 years ago
Psl 250 when the ventricles are contracting, blood is flowing through which valves?
Likurg_2 [28]

Pulmonary valve and Aortic valve

During systole, the aortic and pulmonic valves open to permit ejection into the aorta and pulmonary artery.

<h3>What happen when ventricles contract ?</h3>

When the right ventricle contracts, blood is forced through the pulmonary semilunar valve into the pulmonary artery

  • Then it travels to the lungs. In the lungs, the blood receives oxygen then leaves through the pulmonary veins. It returns to the heart and enters the left atrium.

  • When the left ventricle contracts, it forces blood through the aortic semilunar valve and into the aorta. The aorta and its branches carries the blood to all the body's tissues.

Learn more about Ventricles here:

brainly.com/question/1569437

#SPJ4

8 0
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