Ecosystems, Biodiversity & Conservation are crucial topics in environmental science that play a significant role in various school and competitive exams. Understanding these concepts not only helps in grasping the intricacies of our natural world but also enhances your exam preparation. Practicing MCQs and objective questions on these subjects can significantly improve your scores by reinforcing key concepts and helping you identify important questions.
What You Will Practise Here
Definitions and key concepts related to ecosystems and biodiversity.
Types of ecosystems and their characteristics.
The importance of biodiversity and its role in ecosystem stability.
Conservation strategies and their significance in protecting ecosystems.
Human impact on ecosystems and biodiversity loss.
Diagrammatic representations of food chains and food webs.
Important formulas related to ecological calculations.
Exam Relevance
The topics of Ecosystems, Biodiversity & Conservation are frequently featured in CBSE, State Boards, NEET, and JEE exams. Students can expect questions that assess their understanding of ecological principles, conservation methods, and the interdependence of species within ecosystems. Common question patterns include multiple-choice questions that require students to apply their knowledge to real-world scenarios, making it essential to be well-prepared with practice questions.
Common Mistakes Students Make
Confusing the terms "ecosystem" and "habitat".
Overlooking the significance of keystone species in maintaining ecosystem balance.
Misunderstanding the concept of biodiversity hotspots.
Neglecting the impact of invasive species on local ecosystems.
FAQs
Question: What are the main types of ecosystems? Answer: The main types of ecosystems include terrestrial ecosystems (like forests and grasslands) and aquatic ecosystems (like freshwater and marine).
Question: Why is biodiversity important for ecosystems? Answer: Biodiversity is crucial as it enhances ecosystem productivity, resilience, and stability, ensuring that ecosystems can withstand environmental changes.
Now is the time to boost your understanding and confidence! Dive into our practice MCQs on Ecosystems, Biodiversity & Conservation and test your knowledge to excel in your exams.
Q. A botanical garden has 400 species of plants, and 10% of them are rare. How many rare species are there?
Q. A certain ecosystem has a carrying capacity of 1000 individuals. If the current population is 750, what percentage of the carrying capacity is currently being utilized?
A.
60%
B.
70%
C.
75%
D.
80%
Solution
(750 / 1000) * 100 = 75% of the carrying capacity.
Q. A certain ecosystem has a carrying capacity of 1000 individuals. If the current population is 800, what percentage of the carrying capacity is currently being utilized?
A.
70%
B.
75%
C.
80%
D.
85%
Solution
(800 / 1000) * 100 = 80% of the carrying capacity.
Q. A certain ecosystem has a carrying capacity of 300 animals. If the current population is 240, what percentage of the carrying capacity is currently utilized?
A.
60%
B.
70%
C.
80%
D.
90%
Solution
(240 / 300) * 100 = 80% of the carrying capacity utilized.
Q. A certain plant species can grow in 5 different types of soil. If a researcher tests 3 types of soil, what is the probability that the plant will grow in the tested soil?
A.
1/5
B.
3/5
C.
1/3
D.
2/5
Solution
The probability is the number of favorable outcomes (3) over the total outcomes (5), which is 3/5.
Q. A certain species of fish can reproduce every 6 months. If a single fish reproduces 20 offspring each time, how many fish will there be after 3 years assuming no deaths?
A.
80
B.
100
C.
120
D.
140
Solution
3 years = 6 periods of reproduction. 1 fish produces 20 offspring each time: 20 * 6 = 120 fish.
Q. A certain species of fish can reproduce every 6 months. If a single fish reproduces 20 offspring each time, how many fish will there be after 3 years assuming all offspring survive?
A.
80
B.
160
C.
320
D.
640
Solution
3 years = 6 periods of 6 months. 20 offspring * 6 = 120 fish + 1 original = 121 fish.
Q. A conservation program aims to increase the population of an endangered species from 300 to 600 in 5 years. What is the required annual growth rate?
A.
10%
B.
15%
C.
20%
D.
25%
Solution
To double the population in 5 years, the annual growth rate must be approximately 25%.
Q. A conservation program aims to increase the population of an endangered species by 25% each year. If the current population is 400, what will be the population after 2 years?
A.
500
B.
600
C.
625
D.
700
Solution
After 1 year: 400 + (25% of 400) = 500; After 2 years: 500 + (25% of 500) = 625.
Q. A researcher finds that a certain plant species has a growth rate of 5 cm per month. How tall will the plant be after 2 years if it starts at 10 cm?
A.
70 cm
B.
80 cm
C.
90 cm
D.
100 cm
Solution
2 years = 24 months. Growth = 5 cm/month * 24 months = 120 cm. Total height = 10 cm + 120 cm = 130 cm.
Q. If a certain plant species can grow in 5 different types of soil, and each type of soil can support 10 plants, how many plants can be supported in total?
