An ecosystem is joined by thousands of species, if a problem occurs causing a species to become extinct, it may not affect the proper functioning of the ecosystem initially, but as more and more species are removed, the ecosystem becomes dangerously weak over a period of time. Which hypothesis gave this sentence?
A. Old planetesimal hypothesis
B. Oparin-Haldane hypothesis
C. New planetesimal hypothesis
D. Rivet popper hypothesis
Answer:D
An ecosystem is joined by thousands of species, if a problem occurs causing a species to become extinct, it may not affect the proper functioning of the ecosystem initially, but as more and more species are removed, the ecosystem becomes dangerously weak over a period of time. Which hypothesis gave this sentence?
A. Old planetesimal hypothesis B. Oparin-Haldane hypothesis C. New planetesimal hypothesis D. Rivet popper hypothesis