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Masja [62]
3 years ago
11

How can a scientist test a hypothesis if it is not possible to do a controlled experiment.

Biology
1 answer:
serious [3.7K]3 years ago
3 0

Answer:

In an experiment, the researcher needs to have a control group with an experimental group where both groups are identical in every way except that the controlled group does not gets the experimental treatment.

Sometimes, it is not possible to do a test or the experiment utilizing a controlled trial (due to ethical reasons or no practical method available). All things considered, a researcher may test a theory by making predictions about outcomes or patterns that ought to be found in nature if the hypothesis is right.

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Rainbow trout is non-native to the United States. However, this species is breeding with the native Gila trout. Scientists recen
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Answer: C. Preying

Explanation:

A non-native species is the species which is introduced to a new ecosystem. This species is introduced intentionally or accidentally to a new ecosystem by human beings or they may enter to the ecosystem by their own.

A non-native species can be invasive which means it can compete with the native species for resources like shelter, food and mates.

According to the given situation, the Gila trouts being the native species has been affected by the non-native Rainbow trout. This may be because of the fact that non-native species can be invasive for the native species. As the species is used as mate by the non-native species and they may become the prey of non-native species. This has resulted in the extinction of the species of Gila trouts.  

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3 years ago
Define irrigation and types of irrigation system​
sertanlavr [38]

irrigation systems, water moves across the surface of an agricultural lands,

Two different methods of irrigation are- modern methods that include sprinkler irrigation and drip irrigation; traditional irrigation that includes manual irrigation where water is pulled out by the farmers themselves from the wells and canals to irrigate the land.

4 0
3 years ago
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Satellite images are not available to students true false
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Answer: It could be true  

Explanation: Stanford students can view Satellite images

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3 years ago
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Final Question: Why is the body so carefully organized, from small levels up to large levels? What does this careful organizatio
valentinak56 [21]

Answer:

Question 1=To make sure your body can work correctly, even when it does many things at once,

Question 2= It helps your blood flow while you are eating it also helps digest and when in danger it also helps send signals to your brain.

Explanation:

4 0
2 years ago
The reflex involved when you stroke an infant's cheek and she/he turns toward the stimulator and begins to suck is called the __
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The reflex involved when you stroke an infant's cheek and she/he turns toward the stimulator and begins to suck is called the rooting reflex.

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3 years ago
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