Question

1. Species can be introduced to new habitat both intentionally and unintentionally. true or false

2. The background rate of extinction is estimated to be about a. there is no way to know how many species go extinct. B. one species for every million each years C. fifty species a year.

3. pollination is an example of A. posible source of new drugs C. chemical diversity D. ecosystem service

4. Every exotic species brought to an area will become invasive to the new ecosystem. true or false

5. Half of the planet's endemic plant species could be found in 34 locations, however these have undergone >70% habitat loss. a. historical preservation sites C. biodiversity hotspots, D. climax communities

6. the variety of species in an community. B. species diversity C. chemical diversity D. genetic diversity

7. The rate of habitat loss is directly impacted by A. facilitative interactions C. natural selection D. climate change

8 the number of different ecosystems on Earth or in a geographical area. A. species diversity C. chemical diversity D. ecosystem diversity

9. speicies that are only found in a given location are characterized as being B. natural C. endemic. D. invasive

10 invasive species are exotic species that B. cause either economic or ecological harm. C. cause ecological harm D. create new niches for other species.

Answer 1

Ans 1) True

The species can be introduced both intentionally and unintentionally in a new area. The intention introduction is done by humans to control the population of another species and unintentional is when species are mingled with new population without knowing.

Ans 2) b) one species for every million each years.

Background extinction rate is the normal extinction rate and is a natural phenomenon. It is something that existed before even when humans became the major contributor of the extinction. It is estimated by the scientists that nearly 1,000 to 10,000 species are being lost at the background rate.

Ans 3) d) an ecosystem service

Pollination is a process where pollen is delivered from the stamen of a particular flower to the stigma of the same flower or different flower. This is a process of fertilization that takes place in flowers.

Ans 4) True

This is not exactly true in all the cases but mostly true if it is able to compete the native species. The exotic species are the species that are introduced from outside to the ecosystem along with the non-invasive species.

Ans 5) c) Diversity hotspot

It is a biogeographic region which is considered an important reservoir of biodiversity and also is threatened with destruction. It mostly refers to biologically rich areas around the world and something that has lost nearly 70% of their original habitat.

Ans 6) Species diversity

The biodiversity is considered to be the variety of life within an ecosystem or community or a particular area. While considering the different types or varieties of species present in a particular community, we consider it to be species diversity.

Ans 7) c) Climate change

The rate of loss of habitat loss has significantly increased due to unfavorable or sudden change in the climate.

Ans 8) d) Ecosystem diversity

The ecosystems present on the planet are different from one another and have their own community that is suitable for growth. However, in a particular geographical area, the different ecosystem are due to presence of ecosystem diversity.

Ans 9) Endemic

The endemic species are those which are present or restricted to a defined geographic location and not found anywhere else. They are indigenous to that particular area or the country.

Ans 10) cause either economic or ecological harm

The invasive species are non-native species which are introduced unintentionally or intentionally in a particular place. They have the tendency to damage the ecosystem or the economy of a particular place by being on a rampant damage spree.