Top answers

There are 10 boys and 20 girls in a class. The mean mark in a test for all the class is 60. The mean mark for the girls is 54. Work out the mean mark for the boys.

First let us consider how we calculate the mean test mark in the first place, we add up the individual test marks of the entire class to give the total test mark then we divide by the number of students. Thi...
AD
Answered by Adam D. • Maths tutor
68033 Views

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.
FS
Answered by Frankie S. • Biology tutor
3185 Views

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.
FS
Answered by Frankie S. • Biology tutor
25190 Views

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 ...
ZC
Answered by Zoe C. • Biology tutor
31841 Views

(Language paper) - ' How has the writer structured the text to convey his/her message to its readers'?

Firstly, read the question and highlight any topic words or sentences that allude to what exactly the examiner is asking of you. Once you have done that, analyse the insert paper provided, by highlighting an...
KM
Answered by Khatra M. • English tutor
2733 Views