When an experiment is replicated How should the results of the two experiments compare?

When an experiment is replicated How should the results of the two experiments compare?

When an experiment is replicated, how should the results of the two experiments compare? The results of the first experiment should be less accurate. The results of the second experiment should be less accurate. The results of the experiments should be similar.

How can scientists best confirm and validate?

Explanation: Repeating the experiment ensures there are no anomalies. Also, it validates the accuracy of the way they carried out the experiment.

Why is validation a threat to science?

Without validation, we risk presenting erroneous results, which could be detrimental to the interpretation. If you “visually” assess something, it must be repeatable, so you must validate the same result can be consistently obtained by you.

Why do scientists use scientific journals to share their findings?

Publishing results of research projects in peer-reviewed journals enables the scientific and medical community to evaluate the findings themselves. It also provides instructions so that other researchers can repeat the experiment or build on it to verify and confirm the results.

Which step comes last in the scientific method?

Iterate. The last step of the scientific method is to reflect on our results and use them to guide our next steps.

Can a theory be revised or replaced?

A theory can change over time. No theory is considered the absolute truth. As new evidence is uncovered, a theory may be revised or replaced by a more useful explanation.

For what reason would a theory be changed or replaced?

Explain why and how theories may be changed or replaced over time. Theories may be changed over time as new information is discovered or new technologies are developed. New developments lead to changes in experimental methods, which provide information that may or may not support the existing theory.

How can new evidence change an existing theory?

As additional scientific evidence is gathered, a scientific theory may be modified and ultimately rejected if it cannot be made to fit the new findings; in such circumstances, a more accurate theory is then required.

Is a theory an educated guess?

A scientist bases their hypothesis on a specific observed event, making an educated guess as to how or why that event occurs. Their hypothesis may be proven true or false by testing and experimentation. A theory, on the other hand, is a substantiated explanation for an occurrence.

Has the law of gravity been proven?

The movement of every object — from a person to a supermassive black hole — produces gravitational waves. Most everyone in the scientific community believe gravitational waves exist, but no one has ever proved it.

Is evolution a theory or law?

Evolution is only a theory. It is not a fact or a scientific law.

Is natural selection a theory or a law?

Natural selection is the fundamental law which allows biologists to explain the origin of (new) species, and the evolutionary development of new life habits and adaptations (Mayr 1960).

Is evolution still happening in humans?

Contrary to popular belief, not only are humans still evolving, their evolution since the dawn of agriculture is faster than ever before. It is possible that human culture—itself a selective force—has accelerated human evolution.

Is evolution still occurring today?

organisms. Evolution is not a phenomenon of the past. It is an active process occurring even now. The emergence of new strains of influenza, drug-resistant cancer cells, and pesticide-resistant insects demonstrate that the genetic makeup of populations changes over time by the process of natural selection.

Can we speed up evolution?

Using computer simulations, we find that evolution toward goals that change over time can, in certain cases, dramatically speed up evolution compared with evolution toward a fixed goal. This study suggests that varying environments might significantly contribute to the speed of natural evolution.

Why is evolution so slow?

Evolution is usually thought to be a very slow process, something that happens over many generations, thanks to adaptive mutations. But environmental change due to things like climate change, habitat destruction, pollution, etc. is happening very fast.

What factors speed up evolution?

Five different forces have influenced human evolution: natural selection, random genetic drift, mutation, population mating structure, and culture. All evolutionary biologists agree on the first three of these forces, although there have been disputes at times about the relative importance of each force.

What can speed up mutations?

Mutations happen spontaneously. The rate of mutation can be increased by environmental factors such as UV radiation , X-rays, gamma rays and certain types of chemicals such as bromine.

What are the 3 types of mutations?

There are three types of DNA Mutations: base substitutions, deletions and insertions. Single base substitutions are called point mutations, recall the point mutation Glu —–> Val which causes sickle-cell disease.

What can cause mutations?

Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses. Germ line mutations occur in the eggs and sperm and can be passed on to offspring, while somatic mutations occur in body cells and are not passed on.