What are hydroponics and what are the ways to grow plant in this way?

Describe the function of the endomembrane system? what organelles are involved?

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim

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