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tino4ka555 [31]
3 years ago
14

Which scientist confirmed that all cells must come from pre-existing cells?​

Biology
1 answer:
denis23 [38]3 years ago
8 0

rudolf virchow concluded that all cells must come from pre-existing cells?​

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A star is not considered born until the process of nuclear fusion
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Star is a brilliantly glowing sphere of hot gas whose energyis produced by an internalnuclear fusion process. Stars are contained in galaxies. A galaxy contains not only stars, but clouds of gas and dust. These clouds are callednebulae, and it is in a nebula where stars are born. In the nebula is hydrogen gas which is pulled together by gravityand starts to spin faster. Over millions of years, more hydrogen gas is pulled into the spinning cloud. The collisions which occur between the hydrogen atoms starts to heat the gas in the cloud. Once the temperature reaches 15,000,000 degrees Celsius, nuclear fusion takes place in the center, or core, of the cloud. The tremendous heat given off by the nuclear fusion process causes the gas to glow creating a protostar. This is the first step in the evolution of a star. The glowing protostar continues to accumulate mass. The amount of mass it can accumulate is determined by the amount ofmatter available in the nebula. Once its mass is stabilized, the star is known as a main sequence star. The new star will continue to glow for millions or even billions of years. As it glows, hydrogen is converted into helium in the core by nuclear fusion. The core starts to become unstable and it starts to contract. The outer shell of the star, which is still mostly hydrogen, starts to expand. As it expands, it cools and starts to glow red. The star has now reached the red giant phase. It is red because it is cooler than the protostar phase and it is a giant because the outer shell has expanded outward. All stars evolve the same way up to the red giant phase. The amount of mass a star has determines which of the following life cycle paths the star will take.
4 0
3 years ago
"Human glucocebrosidase, for treatment of Gaucher's disease, has been successfully produced using carrot cells. What is a major
arlik [135]

Answer:

Human glucocebrosidase is used as a therapeutic drug which is used to treat Gaucher's disease.

The farming of this substances in crops is very helpful for the population. The genetic engineering to insert genes in plants would result in GMOs.

It is more beneficial to use plants for this process as compared to that of animals because it is easily available and easily extracted.

It is more economical and easily accessible by people. It would not harm animals by incorporating the gene in them in laboratory conditions.  

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3 years ago
A car travels 80 miles in 2 hours. What is the average speed in mph?A car travels 80 miles in 2 hours. What is the average speed
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Answer:

40 miles/hour

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(80 miles) / (2 hours)= 40 miles/ hour

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3 years ago
Which of these is an example of WEATHER at a specific place and time?
Viefleur [7K]

Answer:

a

Explanation:

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2 years ago
While volunteering at a hospital, Alex learns that there are several different human blood types and they are determined by alle
SIZIF [17.4K]

Answer:

They are codominant

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There are 3 different alleles: IA, IB and i - IA and IB are codominants, i is recessive. Codominance means neither allele can mask the expression of the other and both alleles A and B are expressed in the blood type.

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