Answer:
The correct answer is:
Includes at least two groups, one of which does not receive the experimental treatment. (B)
Explanation:
A controlled experiment is made up of at least two groups of participants (subjects). One group (the test group) receives the experimental treatment, which can be an intervention or a new drug to be tested etc, and the effect of the treatment on the subjects is measured, while the second group of similar subjects also known as the control group acts as a baseline and do not receive the treatment or intervention. They act as a baseline to ensure that the change observed in the treatment group was brought about as a result of the treatment.
<em>Note that repeating the experiment several times does not ensure accuracy of the result, rather it ensures reliability of the results hence option D is not correct</em>
Answer: DNA is a polymer of nucleotides, which consist of a sugar, a phosphate group, and a nitrogenous base
Explanation:
Every molecule in the human body are formed by the chains of particular substances. These components are arranged orderly as linked chains to give the structure called DNA.
The components include nucleotides—this is also considered the chemical substance in the human body which helps in the formation.
In this formation of chains, nitrogenous bases will also be linked to form a polymer of DNA.
Answer:
There you go! they explained it better than I could. hopefully that helps you, for more information you could simply look up an article.
C. Food Processor
Explanation - Food processor is an appliance used in the kitchen that performs multiple purposes like blending, chopping, slicing etc. It makes the preparation of food very easy. Depending on the blades attached to the processor, the working of it varies.
It is also very convenient to use and does not require liquid for doing its purpose like electric blender. It is an electricity based device. It works only when the lid is properly closed to ensure there is no spillage of food and the device is safe to use.
Algae products can be found in ice cream. Yes, you heard it right. You might think they can only be seen in the ocean but today they can be found in ice creams too. A renewable algae oil company that produces crackers, pretzels, vanilla tinged milk, honey mustard sauce, chocolate chip cookies also manufactures ice cream with algae. That is Solazyme. It was said that foods with algae have lesser calories, fat and cholesterol even and tastes even better the original and regular recipes.
