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Lena [83]
3 years ago
15

What is a control in an experiment

Biology
2 answers:
erastovalidia [21]3 years ago
7 0
A control is used to establish a baseline in an experiment.




hope it hepls
Gnesinka [82]3 years ago
7 0
What the variable is based on
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Which statement is the correct contrast to the mistaken idea of spontaneous generation?
kramer

All organisms reproduce either sexually or asexually is the correct contrast to the mistaken idea of spontaneous generation

C . all the organisms reproduce either sexually or asexually

<u>Explanation:</u>

The organism could not arise only through the sexually and the asexual reproduction but it is also reproduced through the process of spontaneous generation.

The essential character is offspring is while mother supply is the only solid substrates. The reproduction also takes place by either the egg of the mother or the sperm of the father and began to grow when it is stimulated. Spontaneous generation is defined as the living creature that could arise from nonliving matter.

4 0
3 years ago
Questions
Marat540 [252]

The decay of uranium isotopes is used to provide information about the age of Earth.

<h3>Explanation:</h3>

Isotopes of Uranium U-232, U-233 , U-234 , U-235 , U-236 , U-238 are used as fuel in nuclear reactors or as explosives for nuclear weapons. Uranium 238 is not very radioactive and it constitutes for nearly 99.3% of natural uranium on Earth and has the longest lifetime: its period is 4.5 billion years, about the age of Earth.

Use of radiometric dating techniques help in defining the age of substances (natural or man-made) using the known decay rates of radioactive elements. Each element has an  individual decay rate and half life time.

Two Uranium isotopes (U-238 and U-235) are used for radiometric dating. Both the isotopes have different decay rates and half life period. Both are unstable and radioactive. Since two different isotopes produce two different decay clocks (one as a reference to other), it is beneficial in accurately determining the age of samples. The age of earth (rocks or other natural elements) can be easily determined using Uranium isotopes.

4 0
3 years ago
Bill wants to determine his blood type, so he takes a few drops of blood from a puncture wound in his finger and mixes it with v
natita [175]

Answer:

The correct answer is d Bill"s plasma contain B antibodies

Explanation:

As Bill"s plasma contain B antibodies that"s why his blood cells do not aggutinate when mixed with anti B serum.

6 0
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