1.Which of the following statements is TRUE about extinction rate?
a. The extinction rate is stable at normal level
b. The extinction rate in faster by 10 times than before human arrived
c. The extinction rate is expected to be 10,000 faster than the background rate
2. What term is used to describe a species that is no longer existing?
a. Endangered species b. Threaten species c. Extinct species
d. Alarming species
3.By how much was the decline in the world's species diversity since 1975?
a. third One-t b. One-half
c. One-fourth
d. One-tenth

According to Worldwide Fund for Nature, what are the causes of biodiversity decline illegal global trade in wildlife
since 19757?
a.Habitat loss and the legal and illegal trade in wildlife
b Illegal logging and pollution
c. Pollution and habitat loss
d. Climate change and global warming
5 What is the background rate in species extinction before the arrival of modern
human?
A 0.000001%
b. 0.00001%
c. 0.0001%
d. 0.01%
6. What do you call the species that has so few individual survivors that the species could soon become extinct over all or most of its natural range (the area inwhich it is normally found)?
a Endangered species
b. Threaten species
c. Extinct species
d. Alarming species
7. According to biodiversity researchers, which is the biggest threat in wildlife species?
a Pollution
b. Global warming
c. Climate change
d. Habitat loss
8. Next to loss of habitation, which is the next the biggest cause of premature animal
and plant extinctions?
a. Pollution
b. Global warming
c. Climate change
d. Presence of invasive species in the ecosystem
9. Which of the following can affect the bird species population?
a. Trasmission lines
b. Communication towers
c. Climate change
d. All of these
10. Which of the following statements CANNOT cause introduction of nonnative species into the ecosystem?
a. Deforestation
b. Cargo ships
c. Trucks
d. Tourist arrivals
pa help Po plss​