1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
seraphim [82]
3 years ago
14

The cell theory eventually replaced the concept of spontaneous generation as a result of what experimental evidence?

Biology
1 answer:
Arisa [49]3 years ago
4 0

<u>Answer:-</u> <em>Option C </em>- evidence that microorganisms cannot grow in boiled broth when new organisms were not allowed to enter.

<u>Explanation:-</u>

  • <em>Theory of spontaneous generation</em> stated that the living organisms can be created from non living matter. However, this theory was disapproved and replaced by the <em>cell theory</em> which stated that all living organisms are created from cells and new cells arise from pre-existing cells.
  • There were several experiments conducted by various scientists to disapprove the theory of spontaneous generation however, the experiment that was most successful to do so was the one conducted by <em>Louis Pasteur</em> in 1859.
  • <em><u>Description of the experiment:-</u></em>

-In his experiment, Pasteur boiled a meat broth in a flask (it was known that boiling the broth kills the micro organisms) and then heated the neck of the flask to bend into a S- shape.

The purpose of the S shaped neck was to allow the air to enter into the flask but not the micro-organisms as the micro organisms will settle by gravity in the neck and not reach into the flask.

<em>observations of the experiment</em> :-

1. Pasteur observed that even though the air entered the flask no micro organisms were growing in the flask.

2. Further,when he tilted the flask so that the broth came in contact with the part of the neck where the air borne microorganisms could have settled he was able to observe microbial growth in the flask.

These observations laid the theory of spontaneous generation to rest and proved that <em>organisms can only grow in the presence of pre-existing cells </em>which in this case were the microorganisms.  

You might be interested in
I GIVE BRAINLIEST <br><br> Both question please.
Doss [256]

Answer:

4. D

5.d

7B

Explanation:

5 0
3 years ago
What are the characteristics of each of Earth’s Layers?
Andrews [41]
Each layer has its own properties, composition, and characteristics that affects many of the key processes of our planet. They are, in order from the exterior to the interior – the crust, the mantle, the outer core, and the inner core.
6 0
3 years ago
An individual flying over the chernobyl site two days after the explosion most probably experienced what hazard or hazards?
jeyben [28]
<span>Acute exposure to radioactive substances.
 Acute exposure is radiation exposure that occurs in a short time period. It can be an exposure that occurs once in your lifetime. This might be that one foot x ray you had because you may have broken your foot. Acute exposure can also be exposures that occur more than once, but very infrequently and for short periods of time. This might be dental x rays you get every few years.</span>
3 0
3 years ago
Q: A: Which of these best describes what occurs during cytokinesis?
Nitella [24]
The correct answer is the cytoplasm is divides between the two new daughter cells Cytokinesis is the final stage of the cell cycle in which cytoplasm, the material within the living cell, divides into two daughter cells.
5 0
3 years ago
Describes what happens as carbon cycles through the environment. What takes carbon out of the environment? What things put carbo
Citrus2011 [14]

Answer:

Carbon moves through Earth's ecosystems in a cycle referred to as the It is through carbon dioxide gas found in Earth's atmosphere that carbon enters the living parts of an ecosystem. ... To release the energy in food, organisms break down the carbon compounds—a process called respiration.

Photosynthesis removes carbon dioxide naturally—and trees are especially good at storing carbon removed from the atmosphere by photosynthesis. Expanding forests, restoring existing forests and managing forests to encourage more carbon uptake can leverage the power of photosynthesis to convert carbon dioxide in the air into carbon stored in wood and soils. The decompsition of the soil helps create a natural environment which keeps the trees healthy and continuously producing photosynthesis. Direct air capture is the process of chemically scrubbing combustionable carbon dioxide directly from the ambient air, and then storing it either underground or in long-lived products. This new technology is not unlike the carbon capture and storage technology for various emissions sources like power plants and industrial facilities. The difference is that direct air capture removes carbon from the atmosphere instead of consuming emissions.

Carbon dioxide is added to the atmosphere by human activities. When hydrocarbon fuels (i.e. wood, coal, natural gas, gasoline, and oil) are burned, carbon dioxide is released. During combustion or burning, carbon from fossil fuels combine with oxygen in the air to form carbon dioxide. Animals and plants need to get rid of carbon dioxide gas through a process called respiration.

Greenhouse gases have far-ranging environmental and health effects. They cause climate change by trapping heat, and they also contribute to respiratory disease from smog and air pollution. Extreme weather, food supply disruptions, and increased wildfires are other effects of climate change caused by greenhouse gases.If not for the greenhouse effect, Earth would be an ice ball. So, CO2 and other greenhouse gases are good—up to a point. But CO2 is so good at holding in heat from the Sun, that even a small increase in CO2 in the atmosphere can cause Earth to get even warmer.

Hope this helps :)

Explanation:

5 0
3 years ago
Other questions:
  • Extremely high temperatures and pressures are necessary for fusion reactions to take place in stars. Please select the best answ
    9·2 answers
  • the person who first began the study of genetics in the 1800s and was called the father of genetics because of this was????
    8·1 answer
  • What will happen if a healthy red blood cell is placed into a container of pure water? the cell will totally dissolve in the wat
    9·1 answer
  • The rotation of air around a high-pressure center is called a(n)
    13·1 answer
  • The virulent form of the bacteria S. pneumoniae is called the S strain because it is surrounded by a polysaccharide coat that ma
    13·1 answer
  • Besides the ability of some cancer cells to over proliferate, which of the following situations might logically result in a tumo
    12·1 answer
  • Which process is characterized by the movement of particles from an area of high concentration to an area of low concentration a
    6·2 answers
  • Radioactive dating can determine the age of minerals and ____________________ in each layer of rock.
    10·1 answer
  • What happens to the individuals with the
    11·1 answer
  • Consider, pea plants, for which green color is dominant to yellow color, and two leaves are dominant to three. A cross between t
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!