Home / iGCSE Biology (0610)-20.4 Conservation – iGCSE Style Questions Paper 1

iGCSE Biology (0610)-20.4 Conservation – iGCSE Style Questions Paper 1

IGCSE Biology (0610) Practice Questions Paper 1 - All Chapters

Question

Pythons were accidentally introduced to a region in the $1990$s. Since then, they have reproduced in the wild and become a pest. The number of pythons removed from the wild can give an indication of the population size, as shown.
Which phase of the population growth curve of pythons is shown in $2005$?
A death
B exponential (log)
C lag
D stationary
▶️ Answer/Explanation
Detailed solution

The correct answer is B.

The graph shows the python population progress through distinct growth stages. Between $1997$ and $2000$, the population is in the lag phase with slow, initial growth. By $2005$, the curve shows a steep, rapid increase in the number of pythons removed, which characterizes the exponential (log) phase where resources are plenty and the birth rate is high. This continues until approximately $2008$, where the data begins to level off into a stationary phase. Therefore, $2005$ falls directly within the period of most rapid acceleration.

Question

Which methods of conservation are used to protect endangered species?
  1. captive breeding programmes
  2. education
  3. habitat destruction
A $1$, $2$ and $3$
B $1$ and $2$ only
C $1$ and $3$ only
D $2$ and $3$ only
▶️ Answer/Explanation
Correct Answer: B ($1$ and $2$ only)

Conservation aims to preserve biodiversity through active support and protection. Captive breeding (1) helps increase population numbers in safe environments, while education (2) raises awareness to prevent further species decline. In contrast, habitat destruction (3) is a primary driver of extinction rather than a method of protection. Therefore, only the first two options are legitimate conservation strategies.

Question

Which practice helps to maintain biodiversity?

(A) improving crop yields by using herbicides
(B) increasing crop yields by using insecticides
(C) the protection of habitats
(D) the use of large-scale monocultures
▶️ Answer/Explanation
Biodiversity refers to the variety of all living organisms within an ecosystem. Protecting habitats ensures that different species have the resources and environment they need to survive and reproduce. Practices like using herbicides and insecticides (A and B) often reduce biodiversity by killing non-target plants and insects. Similarly, large-scale monocultures (D) involve growing only one type of crop, which significantly lowers the variety of life in that area. Therefore, habitat conservation is the most effective method for maintaining biological diversity.
✅ Answer: (C)
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