Biology, 10.07.2019 06:10, SuperWoman9172
Ariver has different populations of lampreys and paddlefish. the paddlefish feed on zooplankton, while the lampreys feed on the paddlefis
humans living around the river hunt the paddlefish. what will happen to the ecosystem if the paddlefish are hunted in excess?
a.
the population of lamprey will decrease, while the population of paddlefish will increase
b.
the population of paddlefish will decrease, while the population of zooplankton will increase.
c.
the population of paddlefish will increase, while the population of zooplankton will decrease
d.
the population of lamprey will increase, while the population of zooplankton will decrease
reset
next
tum. all rights reserved
Answers: 1
Biology, 21.06.2019 20:00, u8p4
Over the past 60 years, many amphibian species have experienced significant population declines and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. chytridiomycosis is a fungal disease first identified in 1998 as a cause of massive amphibian deaths. in some severely impacted populations, a few individuals have survived, perhaps because of some natural resistance. if these resistant individuals continue to survive and prosper, new resistant populations might emerge. this would be an example of the founder effect artificial selection genetic drift natural selection sexual selection
Answers: 3
Biology, 22.06.2019 06:20, justinamber89
Cells are adapted to preform specific functions. which of the following terms refers to this capability?
Answers: 2
Ariver has different populations of lampreys and paddlefish. the paddlefish feed on zooplankton, whi...
Chemistry, 01.12.2019 23:31
Mathematics, 01.12.2019 23:31
Biology, 01.12.2019 23:31
Chemistry, 01.12.2019 23:31
Mathematics, 01.12.2019 23:31