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Troyanec [42]
2 years ago
9

When setting up an experiment why is it necessary to have a control group

Biology
2 answers:
Papessa [141]2 years ago
5 0

Answer:

To have a group to compare to the experimental group

Explanation:

I took the test k12

Paraphin [41]2 years ago
3 0

A control group in an experiment is a group separated from the rest of the experiment (for example, there is no use of treatment on that group). It is a group where the independent variable being tested cannot influence the results. There are two types of control groups: positive and negative.

Positive- the conditions of the experiment are set to give a positive result

Negative- the conditions of the experiment are set to give a negative outcome.


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Evolution reinforcement
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Answer:

Reinforcement is the process by which natural selection increases reproductive isolation. Reinforcement can occur as follows: When two populations which have been kept apart, come back into contact, the reproductive isolation between them might be complete or incomplete. If it is complete, speciation has occurred.

Explanation:

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4 0
2 years ago
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Scientific investigations often lead to the formulation of new scientific questions. charle’s darwin reviewed his observations a
Veronika [31]

Can evolution create new species over time through natural selection?

is the question he would be prompted to ask based on his voyage.

<h3>Who was Charles Darwin ?</h3>
  • English scientist Charles Darwin gained notoriety for his theory of natural selection, which postulated that organisms in an ecosystem adapt and evolve in order to maintain their survival.
  • Because of this, Darwin was inspired to consider whether natural selection can eventually result in the emergence of new species after studying the selective breeding of pigeons.
  • Darwin came to the following conclusion based on these straightforward observations:
  • In a population, some individuals would have hereditary qualities that assist them survive and reproduce (given the conditions of the environment, such as the predators and food sources present).

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2 years ago
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3. What is the original source of energy for all fossil fuels?
Rina8888 [55]

Answer:

the sun

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All the energy in oil, gas, and coal originally came from the sun, captured through photosynthesis. In the same way that we burn wood to release energy that trees capture from the sun, we burn fossil fuels to release the energy that ancient plants captured from the sun.

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Reciprocal altruism can be best explained with a model proposed by Robert Trivers in 1971. Trivers hypothesized that if one indi
Leni [432]

Answer:

Reciprocal altruism is one of the altruism behaviors in which an individual organism helps in increasing the fitness of another organism by reducing the fitness of itself temporarily in expectation of the same behavior from another organism in the future later.

It takes place in the same set of organism partners which is a continuous interaction ion in stable groups of organisms.

Thus, the correct answer would be - an ongoing interaction in the same set of partners.

6 0
3 years ago
Which is a homologous chromosome pair?
nadezda [96]

Answer: Homologous chromosomes are the pairs of chromosomes that having same gene sequence, equal length of arms and centromere location. Homologous chromosomes have two homolog one come from male parent and other come from female parent.

Explanation:

These chromosomes Are formed for the purpose of genetic variations. They are called homologous because when two same structured exist it form pair together

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