Q. No.Destruction of all tropical rainforests will lead to the extinction of approximately what percent of species found on the earth?
1. 10
2. 20
3. 50
4. 90
1. 10
2. 20
3. 50
4. 90
Fishes can be killed by acid rain due to the release of:
1. aluminum ions
2. carbon monoxide
3. anticoagulants
4. mercury
Which of the following is a biocide that was first to be used on a large scale?
| 1. | DDT | 2. | 2,4-D |
| 3. | Mercury | 4. | Methane |
The most effective biologic control of insects is achieved by:
| 1. | insectivorous birds | 2. | biocides |
| 3. | parasitoid wasps | 4. | parasitic nematodes |
Match each item in Column I with one in Column II and choose the correct answer from the codes given below:
|
Column I |
Column II |
||
|
A. |
Genetic diversity |
a. |
Western ghats have greater amphibian diversity than eastern ghats |
|
B. |
Species diversity |
b. |
India has more than 50000 genetically different strains of rice |
|
C. |
Ecological diversity |
c. |
India has more ecosystems than Norway |
Codes :
| A | B | C | |
| 1. | a | b | c |
| 2. | b | a | c |
| 3. | c | b | a |
| 4. | b | c | a |
Identify the incorrectly matched pair:
|
1. |
Dodo |
Mauritius |
|
2. |
Quagga |
Africa |
|
3. |
Thylacine |
Australia |
|
4. |
Stellar’s sea cow |
USA |
Identify the incorrectly matched pair:
|
1. |
Dodo |
Migratory bird |
|
2. |
Quagga |
A relative of Zebra |
|
3. |
Thylacine |
Largest carnivorous marsupial |
|
4. |
Stellar’s sea cow |
Aquatic mammal |
In a co-evolved highly specific plant-pollinator obligatory mutualism, if one of the members gets extinct, the other most likely:
| 1. | would increase in number but the diversity in the population would reduce |
| 2. | would increase in number and the diversity in the population would increase |
| 3. | would decrease in number and the diversity in the population would reduce |
| 4. | also go extinct |
Parthenium hysterophorus:
| I: | is also called as carrot grass or the gajar grass. |
| II: | is a common invasive species in India and came as a contaminant with wheat |
| III: | produces allelopathic chemicals |
| IV: | produces pollens that are common cause of allergies in humans |
1. Only I, II and III are correct
2. Only I, II and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
© 2024 GoodEd Technologies Pvt. Ltd.