Who did erwin chargaff not collaborate with in his discovery

Will someone me with this.. specialized cells which perform a particular function form: tissues organs or organism

In a cross between individuals of a species of tropical fish, all of the male offspring have long tail fins, and none of the females possess the trait. mating two of the f1 fish fails to produce females with the trait. explain the inheritance pattern of the trait.

The direct energy source that drives atp synthesis during respiratory oxidative phosphorylation is