In brazil, the indigenous population was around 3.5 million before the arrival of europeans. today, the indigenous population is around
a. 200,000.
b. 1.5 million.
c. 500,000.
d. 2 million.

Rainbow trout is non- native to the united states. however this species is breeding with the native gula yltrout acientistrecently observed that the hola trout were becoming exitinct what is the cause of their extinction

Put these ecosystems in order of least biodiversity to most biodiversity 1. mediterranean forest 2. indonesian rain forest 3. arctic ocean

Where does the availability of water pose the greatest problem