Distribution and Abundance of Species (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does high species evenness indicate about biodiversity?
What does high species evenness indicate about biodiversity?
All species present in similar numbers
Why are gridded quadrats divided into smaller sections?
Why are gridded quadrats divided into smaller sections?
To make percentage cover estimation easier
How is species frequency calculated?
How is species frequency calculated?
Quadrats with species/total quadrats×100
When should percentage cover be used instead of species density?
When should percentage cover be used instead of species density?
For abundant/mat-forming species like grass
What is the main purpose of random sampling in ecological surveys?
What is the main purpose of random sampling in ecological surveys?
To prevent bias and ensure equal chances
Which equipment collects ground-dwelling invertebrates using buried jars?
Which equipment collects ground-dwelling invertebrates using buried jars?
Pitfall traps
In the Lincoln index, if 20 marked snails and 50 total snails caught, with 4 marked, what's N?
In the Lincoln index, if 20 marked snails and 50 total snails caught, with 4 marked, what's N?
250 snails
What does a Simpson's index value near 1 indicate?
What does a Simpson's index value near 1 indicate?
High diversity with similar abundances
When should stratified sampling be used?
When should stratified sampling be used?
When habitat has distinct zones
What does the width of a kite in a kite diagram represent?
What does the width of a kite in a kite diagram represent?
Species' abundance at that location