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Give a definition/explanation for the term 'phenotype'

A phenotype is the expression of the genetic constitution of an organism and how it interacts with the environment.
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Answered by Frankie S. • Biology tutor
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Which of these nucleotide bases is NOT present in RNA: Cytosine, Thymine, Guanine, Adenine, Uracil

The correct answer is: Thymine.The four bases found in DNA molecules are Cytosine, Guanine, Adenine and Thymine but in RNA molecules, the Thymine base is replaced by Uracil.
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Answered by Frankie S. • Biology tutor
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How does saltatory conduction work?

Most axons in the human nervous system are myelinated, meaning they are enclosed in a myelin sheath , a fatty deposit created and maintained by Schwann cells that acts as an electrical insulator . There are ...
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Answered by Zoe C. • Biology tutor
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Given that y = 16x + 1/x , find the two values of x for which dy/dx = 0

The first stage of this question involves differentiating the equation of y in terms of x given to us. In order to differentiate, we first need to write y in terms of base x (where all the terms are x to the...
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Answered by Andrew K. • Maths tutor
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Give one limitation of the cognitive approach to understanding behaviour.

One limitation of the cognitive psychology approach to understanding behaviour is that it lacks ecological validity. Common paradigms and tasks utilised by cognitive psychologists (e.g. the Stroop task) are ...
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