Insights Static Quiz -403, 2019
Environment
INSIGHTS STATIC QUIZ 2019
Quiz-summary
0 of 5 questions completed
Questions:
- 1
- 2
- 3
- 4
- 5
Information
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.
- In the aquatic environment, the sediment-characteristics often determine the type of benthic animals that can thrive there.
- Like humans, plants also have mechanisms to maintain internal temperature.
- Very small animals are rarely found in polar regions since thermoregulation is energetically expensive for these animals.
Which of the above statements is/are correct?
Correct
Solution: b)
The mechanisms used by most mammals to regulate their body temperature are similar to the ones that we humans use. We maintain a constant body temperature of 370C. In summer, when outside
temperature is more than our body temperature, we sweat profusely.
The resulting evaporative cooling, similar to what happens with a desert cooler in operation, brings down the body temperature. In winter when the temperature is much lower than 370C, we start to
shiver, a kind of exercise which produces heat and raises the body temperature. Plants, on the other hand, do not have such mechanisms to maintain internal temperatures.
Thermoregulation is energetically expensive for many organisms. This is particularly true for small animals like shrews and humming birds. Heat loss or heat gain is a function of surface area. Since small animals have a larger surface area relative to their volume, they tend to lose body heat very fast when it is cold outside; then they have to expend much energy to generate body heat through metabolism. This is the main reason why very small animals are rarely found in polar regions.
Incorrect
Solution: b)
The mechanisms used by most mammals to regulate their body temperature are similar to the ones that we humans use. We maintain a constant body temperature of 370C. In summer, when outside
temperature is more than our body temperature, we sweat profusely.
The resulting evaporative cooling, similar to what happens with a desert cooler in operation, brings down the body temperature. In winter when the temperature is much lower than 370C, we start to
shiver, a kind of exercise which produces heat and raises the body temperature. Plants, on the other hand, do not have such mechanisms to maintain internal temperatures.
Thermoregulation is energetically expensive for many organisms. This is particularly true for small animals like shrews and humming birds. Heat loss or heat gain is a function of surface area. Since small animals have a larger surface area relative to their volume, they tend to lose body heat very fast when it is cold outside; then they have to expend much energy to generate body heat through metabolism. This is the main reason why very small animals are rarely found in polar regions.
-
Question 2 of 5
2. Question
To avoid unfavourable conditions, which of the following enter into diapause, a stage of suspended development.
Correct
Solution: a)
In animals, the organism, if unable to migrate, might avoid the stress by escaping in time. The familiar case of bears going into hibernation during winter is an example of escape in time. Some
snails and fish go into aestivation to avoid summer–related problems-heat and dessication. Under unfavourable conditions many zooplankton species in lakes and ponds are known to enter diapause, a stage of suspended development.
Incorrect
Solution: a)
In animals, the organism, if unable to migrate, might avoid the stress by escaping in time. The familiar case of bears going into hibernation during winter is an example of escape in time. Some
snails and fish go into aestivation to avoid summer–related problems-heat and dessication. Under unfavourable conditions many zooplankton species in lakes and ponds are known to enter diapause, a stage of suspended development.
-
Question 3 of 5
3. Question
Consider the following statements.
- Many desert plants have a special photosynthetic pathway that enables their stomata to remain closed during night time to minimise water loss through transpiration.
- In high altitudes, the body compensates low oxygen availability by increasing red blood cell Production and decreasing the binding affinity of haemoglobin.
Which of the above statements is/are correct?
Correct
Solution: b)
Many desert plants have a thick cuticle on their leaf surfaces and have their stomata arranged in deep pits (sunken) to minimise water loss through transpiration. They also have a special photosynthetic pathway (CAM) that enables their stomata to remain closed during day time.
in the low atmospheric pressure of high altitudes, the body does not get enough oxygen. The body
compensates low oxygen availability by increasing red blood cell production, decreasing the binding affinity of hemoglobin and by increasing breathing rate.
Incorrect
Solution: b)
Many desert plants have a thick cuticle on their leaf surfaces and have their stomata arranged in deep pits (sunken) to minimise water loss through transpiration. They also have a special photosynthetic pathway (CAM) that enables their stomata to remain closed during day time.
in the low atmospheric pressure of high altitudes, the body does not get enough oxygen. The body
compensates low oxygen availability by increasing red blood cell production, decreasing the binding affinity of hemoglobin and by increasing breathing rate.
-
Question 4 of 5
4. Question
Consider the following statements about the application of algae.
- Used to make Biodiesel and Bioethanol.
- It is a complete protein with essential amino acids.
- Used as fertilizers and soil conditioners.
- Used in Wastewater Treatment.
Which of the above statements is/are correct?
Correct
Solution: d)
- Algae can be used to make Biodieseland Bioethanol.
- It is a complete protein with essential amino acids (unlike most plant foods) that are involved in major metabolic processes such as energy and enzyme production.
- They are used as fertilizers, soil conditioners and are a source of livestock feed.
- Algae are used in Wastewater Treatmentfacilities, reducing the need for greater amounts of toxic chemicals than are already used.
- Algae can be used to capture fertilizers in runoff from farms.
Incorrect
Solution: d)
- Algae can be used to make Biodieseland Bioethanol.
- It is a complete protein with essential amino acids (unlike most plant foods) that are involved in major metabolic processes such as energy and enzyme production.
- They are used as fertilizers, soil conditioners and are a source of livestock feed.
- Algae are used in Wastewater Treatmentfacilities, reducing the need for greater amounts of toxic chemicals than are already used.
- Algae can be used to capture fertilizers in runoff from farms.
-
Question 5 of 5
5. Question
With reference to ‘decomposition’, which of the following statements is/are correct?
- Humus is highly susceptible to microbial action and undergo decomposition at fast rate.
- Decomposition is slower if detritus is rich in nitrogen.
- Low temperature and lack of oxygen supply inhibit the decomposition.
Select the correct answer code:
Correct
Solution: b)
Humus is less susceptible to microbial action and act as a reservoir of nutrients. Humus
is highly resistant to microbial action and undergoes decomposition at an extremely slow rate.
Decomposition is largely an oxygen-requiring process. The rate of decomposition is controlled by chemical composition of detritus and climatic factors. In a particular climatic condition, decomposition rate is slower if detritus is rich in lignin and chitin, and quicker, if detritus is rich in nitrogen and water-soluble substances like sugars.
Incorrect
Solution: b)
Humus is less susceptible to microbial action and act as a reservoir of nutrients. Humus
is highly resistant to microbial action and undergoes decomposition at an extremely slow rate.
Decomposition is largely an oxygen-requiring process. The rate of decomposition is controlled by chemical composition of detritus and climatic factors. In a particular climatic condition, decomposition rate is slower if detritus is rich in lignin and chitin, and quicker, if detritus is rich in nitrogen and water-soluble substances like sugars.
