Static Quiz 07 April 2025 (Environment)
Quiz-summary
0 of 5 questions completed
Questions:
- 1
- 2
- 3
- 4
- 5
Information
Static Quiz 07 April 2025 (Environment) For UPSC Exam
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
Results
0 of 5 questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 points, (0)
Categories
- Not categorized 0%
- 1
- 2
- 3
- 4
- 5
- Answered
- Review
- Question 1 of 5
1. Question
Consider the following statements regarding factors influencing phytoplankton biodiversity:
1. Salinity affects primary productivity in aquatic systems.
2. The rate of photosynthesis in phytoplankton is constant and unaffected by light intensity.
3. Nitrogen and phosphorus are key nutrients required for phytoplankton growth.
How many of the above statement(s) is/are correct?CorrectAnswer: b
Explanation:
• Statement 2 is incorrect: Light intensity significantly affects photosynthesis in phytoplankton.
• Statements 1 and 3 are correct: Salinity and the availability of nutrients like nitrogen and phosphorus are crucial for phytoplankton biodiversity and productivity.IncorrectAnswer: b
Explanation:
• Statement 2 is incorrect: Light intensity significantly affects photosynthesis in phytoplankton.
• Statements 1 and 3 are correct: Salinity and the availability of nutrients like nitrogen and phosphorus are crucial for phytoplankton biodiversity and productivity. - Question 2 of 5
2. Question
Consider the following statements regarding characteristics of trees:
1. Evergreen trees shed all their leaves briefly during autumn.
2. Bark coloration may change as the tree ages.
3. The oldest living trees are cone-bearing pines.
How many of the above statement(s) is/are correct?CorrectAnswer: b
Explanation:
• Statement 1 is incorrect: Evergreen trees retain their foliage year-round and do not shed all leaves at once.
• Statements 2 and 3 are correct: Bark color can vary with age, and cone-bearing pines like Bristlecone pines are among the oldest living trees on Earth.IncorrectAnswer: b
Explanation:
• Statement 1 is incorrect: Evergreen trees retain their foliage year-round and do not shed all leaves at once.
• Statements 2 and 3 are correct: Bark color can vary with age, and cone-bearing pines like Bristlecone pines are among the oldest living trees on Earth. - Question 3 of 5
3. Question
Consider the following statements about sapwood in trees:
1. Sapwood is composed of xylem and represents the youngest wood.
2. Heartwood is essentially dead sapwood located at the tree’s center.
Which of the above statement(s) is/are correct?CorrectAnswer: c
Explanation:
• Sapwood (active xylem) is the outer, lighter region that conducts water and nutrients.
• Heartwood is the inner, non-living core formed from older sapwood, providing structuIncorrectAnswer: c
Explanation:
• Sapwood (active xylem) is the outer, lighter region that conducts water and nutrients.
• Heartwood is the inner, non-living core formed from older sapwood, providing structu - Question 4 of 5
4. Question
Consider the following statements about zooplankton:
1. They are heterotrophic plankton.
2. Zooplankton abundance influences fish populations.
3. Zooplankton are more commonly found in mangrove waters than in adjacent coastal waters.
How many of the above statement(s) is/are correct?CorrectAnswer: c
Explanation:
• All three statements are correct:
◦ Zooplankton are heterotrophs feeding on phytoplankton.
◦ They influence fish populations due to their role as a primary food source.
◦ Their density and diversity are often higher in nutrient-rich mangrove ecosystems compared to adjacent coastal areas.IncorrectAnswer: c
Explanation:
• All three statements are correct:
◦ Zooplankton are heterotrophs feeding on phytoplankton.
◦ They influence fish populations due to their role as a primary food source.
◦ Their density and diversity are often higher in nutrient-rich mangrove ecosystems compared to adjacent coastal areas. - Question 5 of 5
5. Question
Consider the following statements about seaweeds:
1. Seaweeds are used medicinally to treat goiter and digestive issues.
2. They thrive in shallow coastal regions with available substrates.
3. Seaweeds are absent along Indian coasts, though seagrasses are present.
Which of the above statement(s) is/are correct?CorrectAnswer: a
Explanation:
• Statements 1 and 2 are correct: Seaweeds are rich in iodine, helping treat goiter, and grow in shallow coastal areas attached to rocks or other substrates.
• Statement 3 is incorrect: Seaweeds are abundantly found along Indian coasts, especially in Tamil Nadu, Gujarat, and Kerala.IncorrectAnswer: a
Explanation:
• Statements 1 and 2 are correct: Seaweeds are rich in iodine, helping treat goiter, and grow in shallow coastal areas attached to rocks or other substrates.
• Statement 3 is incorrect: Seaweeds are abundantly found along Indian coasts, especially in Tamil Nadu, Gujarat, and Kerala.
