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zzz [600]
3 years ago
14

Why is experimentation so important to science?

Biology
1 answer:
Lemur [1.5K]3 years ago
5 0
Because if your prediction is wrong your experiment can prove it right or wrong.
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Which of the following breaks down the Ozone Layer when combined with cold and light?
kvasek [131]

Answer:

CFC ( chlorofluorocarbon)

5 0
3 years ago
List the the planets from most circular to least circular
RUDIKE [14]

Answer AND Explanation:

Perfectly circular orbit have an eccentricity of zero

<h3>PLANET       ECCENTRICITY</h3>

Venus            0.007

Neptune       0.009

Earth             0.017

Uranus          0.047

Jupiter           0.048

Saturn           0.056

Mars             0.093

Mercury        0.206

Pluto             0.248

7 0
3 years ago
Which phrase best describes DNA? A. the structure that transports copied information to the ribosomes B. the molecule from which
hodyreva [135]
The answer is B. the molecule from which RNA is produced.

DNA is the molecule from which RNA is produced. That process is called transcription. In the process, DNA serves as a template for mRNA (messenger RNA) synthesis. mRNA then carries information for a synthesis of proteins which are made of connecter amino acids.
8 0
3 years ago
You are studying an enzyme that is inactivated by phosphorylation and create a mutant in which the threonine that is normally ph
drek231 [11]

Answer:

always active  

Explanation:

Phosphorylation is a posttranslational modification that consists of the addition of phosphate groups to specific amino acids on the protein. Phosphorylation acts as a molecular switch for proteins that are phosphorylated (i.e., in some situations phosphorylation acts to activate protein function, whereas in other situations phosphorylation can inactivate protein function). Phosphorylation modifies the three-dimensional structure of the protein, thereby affecting, for example, the accessibility of the active site of a phosphorylated enzyme to its substrate. Phosphorylation can occur only at the side chains of three amino acids: Serine, Threonine and Tyrosine. In this case, the enzyme is inactivated by phosphorylation on the Threonine residue, so it is expected that the mutant enzyme cannot be phosphorylated, remaining in an active state.

3 0
3 years ago
4 facts about vaccines in relation to viruses
lesya692 [45]

Answer:  Fact: Vaccines contain ingredients that allow the product to be safely administered. Any substance can be harmful in significantly high doses, even water. Vaccines contain ingredients at a dose that is even lower than the dose we are naturally exposed to in our environment. Thimerosal, a mercury-containing compound, is a widely-used preservative for vaccines that are manufactured in multi-dose vials. We are naturally exposed to mercury in milk, seafood, and contact lens solutions. There is no evidence to suggest that the amount of thimerosal used in vaccines poses a health risk. Many vaccines now produce single-dose vials which has greatly decreased the use of thimerosal in vaccines. Formaldehyde, another vaccine ingredient, is in automobile exhaust, household products and furnishings such as carpets, upholstery, cosmetics, paint and felt-tip markers, and in health products such as antihistamines, cough drops and mouthwash. The dose in vaccines is much lower than the amount we are exposed to in our daily life. Not all vaccines contain aluminum, but those that do typically contain about .125 mg to .625 mg per dose. This, too, is much less than what the average person consumes in a day. An estimated 30 to 50 mg of aluminum is consumed by the average person daily, mainly from foods, drinking water and medicines.

2.Vaccines are very safe. Most vaccine reactions are usually temporary and minor, such as a fever or sore arm. It is rare to experience a very serious health event following a vaccination, but these events are carefully monitored and investigated. You are far more likely to be seriously injured by a vaccine-preventable disease than by a vaccine. For example, polio can cause paralysis, measles can cause encephalitis (inflammation of the brain) and blindness, and some vaccine-preventable diseases can even result in death. The benefits of vaccination greatly outweigh the risk, and without vaccines many more injuries and deaths would occur. Science has not yet determined the cause of autism and SIDS. These diagnoses are made, though, during the same age range that children are receiving their routine immunizations. The 1998 study that raised concerns about a possible link between measles-mumps-rubella (MMR) vaccine and autism was retracted by the journal that published it because it was significantly flawed by bad science. There is no evidence to link vaccines as the cause of autism or SIDS.2.

3. Vaccine-preventable diseases have many serious complications that can be avoided through immunization. For example, more than 226,000 people are hospitalized from influenza complications including 20,000 children. About 36,000 people die from influenza each year. Vaccines stimulate the immune system to produce an immune response similar to natural infection, but they do not cause the disease or put the immunized person at risk of its potential complications.

4. Herd immunity occurs when a large population of a community is immunized against a contagious disease, reducing the chance of an outbreak. Infants, pregnant women and immunocompromised people who cannot receive vaccines depend on this type of protection. However, if enough people rely on herd immunity as the method of preventing infection from vaccine-preventable diseases, herd immunity will soon disappear.

Explanation:

7 0
3 years ago
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