Environment and Ecology
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Question 1 of 5
1. Question
2 points1. A community of organisms that is in near equilibrium with the environment is called
Correct
ANSWER: B
Explanation
- An important characteristic of all communities is that their composition and structure constantly change in response to the changing environmental conditions. This change is orderly and sequential, parallel with the changes in the physical environment. These changes lead finally to a community that is in near equilibrium with the environment and that is called a climax community. The gradual and fairly predictable change in the species composition of a given area is called ecological succession.
Incorrect
ANSWER: B
Explanation
- An important characteristic of all communities is that their composition and structure constantly change in response to the changing environmental conditions. This change is orderly and sequential, parallel with the changes in the physical environment. These changes lead finally to a community that is in near equilibrium with the environment and that is called a climax community. The gradual and fairly predictable change in the species composition of a given area is called ecological succession.
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Question 2 of 5
2. Question
2 points2. In aquatic ecosystems, the limiting factor for the productivity is
Correct
ANSWER: D
Explanation
- A constant input of solar energy is the basic requirement for any ecosystem to function and sustain. Primary production is defined as the amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis.
Incorrect
ANSWER: D
Explanation
- A constant input of solar energy is the basic requirement for any ecosystem to function and sustain. Primary production is defined as the amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis.
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Question 3 of 5
3. Question
2 pointsIncreasing carbon dioxide will cause sea ice to reduce in spatial coverage. In turn, the reduced sea ice extent is a
Correct
ANSWER: A
Explanation
- Feedback in general is the process in which changing one quantity changes a second quantity, and the change in the second quantity in turn changes the first. Positive (or reinforcing) feedback amplifies the change in the first quantity while negative (or balancing) feedback reduces it. Large positive feedbacks can lead to effects that are abrupt or irreversible, depending upon the rate and magnitude of the climate change. Albedo is the amount of insolation reflected back by the surface. Higher albedo decreases ambient temperatures.
Incorrect
ANSWER: A
Explanation
- Feedback in general is the process in which changing one quantity changes a second quantity, and the change in the second quantity in turn changes the first. Positive (or reinforcing) feedback amplifies the change in the first quantity while negative (or balancing) feedback reduces it. Large positive feedbacks can lead to effects that are abrupt or irreversible, depending upon the rate and magnitude of the climate change. Albedo is the amount of insolation reflected back by the surface. Higher albedo decreases ambient temperatures.
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Question 4 of 5
4. Question
2 pointsConsider the following statements:
- Agriculture and waste contributed the most to methane emissions.
- Highest growth rates in nitrous oxide emissions come from emerging economies.
Which of the above statements is/are correct?
Correct
ANSWER: C
Incorrect
ANSWER: C
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Question 5 of 5
5. Question
2 pointsWhich of the following plants found in India is/are insectivorous?
- Sundew
- Aldrovanda
- Butterwort
Select the correct answer from the codes given below:
Correct
ANSWER: D
Incorrect
ANSWER: D
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