How would you manage a freshwater reservoir for sustainable fisheries​

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

The diagram shows the results when two parents are crossed. the letters represent alleles for a trait that is controlled by three different genes. which best describes this inheritance pattern? multiple allele because a trait is controlled by three different genes polygenic because the offspring have alleles from both parents multiple allele because the offspring have alleles from both parents polygenic because a trait is controlled by three different genes

What does spontaneous generation mean?