Read the passage carefully and give the answers to the next five questions: Does the number of species in a community really matter to the functioning of the ecosystem? This is a question for which ecologists have not been able to give a definitive answer. For many decades, ecologists believed that communities with more species, generally, tend to be more stable than those with less species. According to the International Union for Conservation of Nature and Natural Resources (IUCN) (2004), the total number of plant and animal species described so far is more than 1.5 million.
The scientist who proved that species richness directly correlates with the stability of a community, was:
David Tilman
David Tilman conducted experiments that demonstrated a positive correlation between species richness and ecosystem stability. His studies showed that ecosystems with higher species diversity are better able to withstand and recover from environmental disturbances.
Match List-I with List-II:
| List-I (Recent Extinction) | List-II (Place) |
|---|---|
| (A) Dodo | (I) Africa |
| (B) Quagga | (II) Russia |
| (C) Thylacine | (III) Mauritius |
| (D) Stellar’s Sea Cow | (IV) Australia |
Choose the correct answer from the options given below:
Ex-situ conservation includes:
In ‘rivet popper hypothesis,’ the ‘rivet’ signifies:
Among the vertebrates, which of the following is the most species-rich group?
The following are the various hypotheses proposed in explaining the greatest biological diversity in tropics except:
Match List-I with List-II:
List-I (Placental mammals)
List-II (Counterpart Marsupials)
| List-I | List-II |
|---|---|
| (A) Anteater | (I) Spotted cuscus |
| (B) Bobcat | (II) Numbat |
| (C) Lemur | (III) Flying Phalanger |
| (D) Flying squirrel | (IV) Tasmanian tiger cat |
Choose the correct answer from the options given below:
The levels of biodiversity include:
Match List-I with List-II:
| List-I (Name of the Extinct Animal) | List-II (Name of the country) |
|---|---|
| (A) Stellar Sea Cow | (I) Mauritius |
| (B) Dodo | (II) Africa |
| (C) Thylacine | (III) Russia |
| (D) Quagga | (IV) Australia |
Examples of Ex-situ conservation are:
Which of the following terms refers to the confinement of species to a specific area and also the same species are not found anywhere?
Match List-I with List-II:
| List-I | List-II |
|---|---|
| (A) Agarose | (I) Polymerase chain reaction |
| (B) Thermostable DNA polymerase | (II) Electrophoresis |
| (C) Micro injection | (III) Ampicillin resistance gene |
| (D) Selectable marker | (IV) Introduction of alien DNA in animal cell |
Choose the correct answer from the options given below: