What is a description of biodiversity?
A) the number of different animal species that live in an area
B) the number of different plant species that live in an area
C) the number of different species that live in an area
D) the number of individuals of a particular species that live in an area
▶️ Answer/Explanation
Ans: C
Biodiversity refers to the variety of all living organisms (plants, animals, microorganisms) in an ecosystem, not just specific groups or population sizes.
Options A and B are too narrow (focusing only on animals or plants), while D describes population size, not diversity. C is correct as it encompasses all species.
The graph shows how the population of a species of bird has increased following a conservation programme.
What is the percentage increase in the number of breeding pairs of birds from 1996 to 2002, to the nearest whole number?
A) 35%
B) 74%
C) 170%
D) 283%
▶️ Answer/Explanation
Ans: D
Assuming the graph shows ~100 pairs in 1996 and ~383 pairs in 2002: Percentage increase = [(383-100)/100] × 100 = 283%. This matches option D. The exact values aren’t visible, but the sharp upward trend suggests a large percentage increase.