A small bird that lives in an island-confined habitat has individuals with varying beak sizes from .....?

Question

...extremely small, medium,and very long.These birds feed primarily on insects to trees and dirt requiring the beaks to workout the insects.A major freeze during the winter has killed off many of the insects in the topsoil this bird naturally feeds on so they are left with their prey that live in the nearby warmer trees.The birds with the largest beaks have the advantage of having acces to these "hard reached" insects and change the gene pool of this species due to their perpetuation and the loss of the birds whom could not reach their only food source.
1.which is the type of natural selection exibited in this example?
a.stabilizing b.directional c.extreme d.disruptive e.none of the above
2.in the next generation the offspring will primarily consistof individuals with what relative size of beaks?
a.none b.small c.medium d.large e.they all died
3.The new stress on this organism in it's environment is what?
a.pollution b.new predator c.excessive hunting d.loss of major food source

Answer 1

1. b. directional because it favors one extreme variation of the trait over the average or the other extreme.

2. d. large because the large-beaked birds survived to reproduce and pass on their traits

3. d. loss of major food source, the usual abundance of insects

Answer 2

Its a dumb question. The topsoil may be warmer than the timber. The birds with small beaks might exchange into canibals quite than starve and bugs might repopulate interior of a few months. Beak length is obviously not a dominant gene so those birds might repopulate as properly. Its undesirable technology and that i will't be troubled with it.

Answer 3

1. b
2. d
3. d

Answer 4

1.b
2.d
3.d