Which is a mechanical vector that injects recombinant dna directly into the nucleus of a host cell? gene gun micropipette bacterial plasmid viral phage

What is the number of phosphates in an atp molecule

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2