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Svetllana [295]
3 years ago
9

Darwin's theory predicts that variations can eventually produce a new species. Yet, scientists have never actually seen one livi

ng species give rise to another. Explain why not.
Biology
1 answer:
pav-90 [236]3 years ago
3 0
Because evolution takes insanely long?
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lana [24]

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Peristalsis is part of the food digestion process. it's a helpful function we have

Explanation:

4 0
3 years ago
When doing medical research with human subjects,which four limitaions are unavoidable
Illusion [34]

Answer:

There are ethical or privacy concerns to consider.

Explanation:

Human subject research is a systematic, scientific investigation that can be either interventional, a trial research or observational (test).

It is necessary to follow the Nuremberg code (1948) and have a voluntary informed consent, the research should be based on previous good results, on prior research, physical or psychological injury and harm should be avoided, benefits should outweigh risks, proper experience of a researcher is needed, right to withdraw consent, and research must stop if harm is arising.

In 1964, a guideline for medical doctors in biomedical research has been established by WMA (The World Medical Association). Helsinki declaration stated the ethical principles involving human subjects that was adopted.

In, 1982  International Ethical Guidelines for Biomedical Research Involving Human Subjects by the World Health Organization (WHO) and Council for International Organizations of Medical Sciences (CIOMS) has been established.  

According to Guidelines (2002) ethical justification and scientific validity of research, ethical review, informed consent, vulnerability ¬ of individuals, groups, communities and populations, women as research subjects, equity regarding burdens and benefits, choice of control in clinical trials, confidentiality, compensation for injury, strengthening of national or local capacity for ethical review, and obligations of sponsors to provide health-care services are outlined.

There are 4 most important principles of ethics such as autonomy, beneficence, non-malfeasance and justice.

Ethical Review Board (ERB) is a committee that has been formally designated to approve, monitor, and review biomedical and behavioural research involving humans. It aims to protect the rights and welfare of the research subjects.  The ERB must have at least five members. The members must have enough experience, expertise, and diversity. If the ERB works with studies that include vulnerable populations, the ERB should have members who are familiar with these groups. The ERB must include at least one person who is not affiliated with the institution or in the immediate family of a person affiliated with the institution.  ERB members may not vote on their projects. The ERB may include consultants in their discussions to meet requirements for expertise or diversity, but only actual ERB members may vote.

4 0
3 years ago
A coral reef is the product of tiny animals—invertebrates related to jellyfish. Inside the tissues of coral animals live microsc
slava [35]
It’s d. Warmer ocean temperatures but you also wrote that the answer is d in your question lol
8 0
3 years ago
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Each isotope has a special name derived from Latin (protium, deuterium, and tritium). What structural feature do these names ref
Eduardwww [97]

An isotope of any element is the same, with a variation in the neutrons of the nucleus.

The mass number change but the atomic number doesn't.

In this case, protium, deuterium, and tritium are all hydrogen isotopes.

Protium is 1H or Hydrogen-1 is without neutrons.

Deuterium is 2H  or Hydrogen-2 has one neutron.

Tritium is 3H or Hydrogen-3 has two neutrons.

8 0
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Pure water has a pH of_ <br>a. 6 <br>b. 7 <br>c. 8 <br>d. 9​
marshall27 [118]

Answer:

It has a pH of 7, so your answer is therefore B.) 7.

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