Which of these is a case of selective breeding?

1.) to increase the production of milk in a herd of milk cows, the highest producing cows were chosen as the mothers.

2.) over time, more milk cows at the diary farm began to produce larger amounts of milk.

3.) a gene was identified that increased milk production. this gene was added to calves in the womb.

4.) the genome of a group of cows was analyzed to identify the gene for milk production.

Achemical equilibrium between gaseous reactants and products is shown. n2(g) + 3h2(g) ⇌ 2nh3(g) how will the reaction be affected if the pressure on the system is increased? it will shift toward the reactant side as there is lower pressure on the reactant side. it will shift toward the product side as there is higher pressure on the product side. it will shift toward the reactant side as there are a greater number of moles of gas on the reactant side. it will shift toward the product side as there are a fewer number of moles of gas on the product side.