Energy requiring reactions can occur in biological systems because enzymes allow their coupling to other reactions with

Energy requiring reactions can occur in biological systems because enzymes allow their coupling to other reactions with products of lower free energy than the reactants

Explanation:

Reactions which release energy are exergonic reactions and those that require energy are endergonic reactions. Exergonic reactions are with negative ∆G where the free energy (ability to do a work) of the products is lesser than the free energy of the reactants of the reaction.  

To utilize the energy that is released during exergonic reactions, endergonic reactions couple with exergonic reactions in biological systems.

Exergonic reactions are spontaneous and can be coupled with endergonic reactions because their equilibrium constant remains greater than 1.  

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.

bacteria could be both, harmful and to us. harmful bacteria could make us sick and probably even by getting the chances of getting a disease, but good bacteria fight it off with your immune system. there is always bacteria everywhere we go. we need to make sure to wash our hands after using the restroom, before eating, after eating, after petting an animal too. so you see, bacteria is everywhere and is harmful or . i hope this . : ) : ) : )