The controlled experiments are performed by the scientists, when they want to study the changes in the sample on changing a single variable. So, the correct answer is option (b).
In case, all variables are kept same, no changes would be observed in the experiment sample. A controlled experiment can be performed on living thing as well as non living. But, controlled experiment cannot be performed on the things which are influenced by a lot of variables, as they cannot create realistic results. So, the option (a), (c), and (d) are incorrect.
"Survival of the fittest" is the one among the following choices given in the question which is an aspect of Darwin's theory that is shown as an example in this scenario. The correct option among all the options that are given in the question is the third option or option "c". I hope that this answer has helped you.
<em>Contradictory claims made by some experts</em><em> is a characteristic of Pseudoscience fact.</em>
<u>EXPLANATION: </u>
Pseudoscience is characterized by contradictory claims that are said to be scientific, but they are not compatible with scientific methods. They are the statements or beliefs that are usually not open for evaluation by other experts.
Also, these are not studied facts which means there is a lack of evidence to support them scientifically. These beliefs are also very resistant to change. For example, Astrology is a Pseudoscience. Other examples are theories related to Bermuda Triangle, Ancient Aliens, etc.
The correct answer is: C. They transfer energy through a medium
There are different types of waves, depending on their medium: electromagnetic (energy is transferred through vibrations of electric and magnetic field), sound (energy is transferred through vibration of air particles), water (energy is transferred through the vibration of the water particles).
Longitudinal waves - particles vibrate parallel to the direction of wave propagation
Transverse wave -particles vibrate perpendicular to the direction of wave propagation.
Answer:
Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function. Unicellular organisms include bacteria, protists, and yeast.
Explanation:
