Percentages (AQA A-Level Biology): Quizzes
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Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does a percentage represent?
What does a percentage represent?
A fraction with denominator of 100
What is the formula for calculating a percentage?
What is the formula for calculating a percentage?
Why are percentages useful in biological surveys?
Why are percentages useful in biological surveys?
Compare data from different sample sizes
If 323 out of 790 primrose flowers are pin-eyed, what percentage is this?
If 323 out of 790 primrose flowers are pin-eyed, what percentage is this?
41%
In two areas, 41% and 67.5% of primrose were pin-eyed. What does this show?
In two areas, 41% and 67.5% of primrose were pin-eyed. What does this show?
Second area had much higher proportion
Two heterozygous parents carry cystic fibrosis allele. What % chance child is affected?
Two heterozygous parents carry cystic fibrosis allele. What % chance child is affected?
25%
What is the formula for percentage change?
What is the formula for percentage change?
Potato tissue goes from 18.50g to 11.72g. What is the percentage change?
Potato tissue goes from 18.50g to 11.72g. What is the percentage change?
-36.7%
What does a negative percentage change indicate?
What does a negative percentage change indicate?
Sample lost mass
Potato tissue lost 36.7% mass in solution. What does this suggest?
Potato tissue lost 36.7% mass in solution. What does this suggest?
Water moved out to concentrated solution