What is the purpose of DNA helicase? A. It binds together the Okazaki fragments.
B. It proofreads the strands and adds in correct base pairs when needed.
C. It adds new base pairs to the original strand.
D. It untwists the strands and removes the hydrogen bonds.
(And please don't go to far into detail- I just need the answer not a whole explanation :/ )​

not sure if this is what you'r looking for eubacteria and archaebacteria

digestion

it excretes wastes

links? do you have a link? i don't see anything?

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.