Advertisements
Advertisements
Questions
Explain the concept of "co-extinction" by taking two examples.
What is co-extinction? Explain with a suitable example?
Advertisements
Solution
When a species becomes extinct, the plant and animal species associated with it, in an obligatory way, also become extinct, e.g., when a host fish species becomes extinct, its parasites also vanish. This is called co-extinction. Some other examples of co-extinction are, plant-pollinator mutualism where the extinction of one leads to the extinction of the other and monophagous insect that feeds on particular plant species becomes extinct due to extinction of that plant species.
APPEARS IN
RELATED QUESTIONS
Species that possess a very high risk of extinction due to rapid population decline of about 50 - 70 % over three generations is designated as ______.
Match the following and choose the correct alternative.
| Column I | Column II | ||
| i. | Not evaluated | a. | Pervasive and abundant after careful assessment |
| ii. | Near threatened | b. | Information related to risk of extinction is lacking in some way |
| iii. | Least concern | c. | Described by scientist but not assessed by the IUCN |
| iv. | Data deficient | d. | May meet the criteria for threatened status in the near future |
Acronym for IUCN is ____________.
______ refers to the conservation of endangered species outside their natural habitats.
Match the following columns.
| Column - I | Column - II |
| (i) Dodo | (a) Africa |
| (ii) Ouagga | (b) Russia |
| (iii) Thylacine | (c) Mauritius |
| (iv) Stellar's sea cow | (d) Australia |
Choose the correct match from the following
The extinction of passenger pigeon was due to ______.
Which among the following forests is known as the "lungs of the planet earth"?
Which of the following is/are endangered plant species?
Which of the following are major causes of species losses in a geographical region?
What is common to the following plants: Nepenthes, Psilotum, Rauwolfia and Aconitum?
What could have triggered mass extinctions of species in the past?
What is common to the species shown in figures A and B?
 |
 |
| A | B |
What criteria should one use in categorizing a species as threatened?
List any two major causes other than anthropogenic causes of the loss of biodiversity.
"Forests provide intangible benefits to us." Explain by taking three different areas, how.
Many species like Stellar's Sea cow and passenger pigeon have been driven to the brink of extinction. Which of the following describes this situation?
Red Data Book is maintained by ______.
Match List - I with List - IІ.
| List - I | List - II |
| A. The Evil Quartet | I. Cryopreservation |
| B. Ex-situ conservation | ΙI. Alien species invasion |
| C. Lantana camara | III. Causes of biodiversity losses |
| D. Dodo | IV. Extinction |
Choose the option with all correct matches.
