EVOLUTION
MODERN THEORY OF EVOLUTION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
there will be no change in beak shape
|
|
|
all of that species of birds will have died off
|
|
|
most birds will have short thick beaks
|
|
|
every bird will have short thick beaks
|
Detailed explanation-1: -If birds with long and thin beaks are better at getting food in a specific environment than birds with short and thick beaks, what do you expect the population will look like after 50 generations? There will be mostly birds with long and thin beaks.
Detailed explanation-2: -Varieties of beak shapes and sizes are an adaptation for the different types of foods that birds eat. In general, thick, strong conical beaks are great at breaking tough seeds, and are found on seed-eating birds such as cardinals, finches, and sparrows.
Detailed explanation-3: -The bigger, stronger muscles associated with larger beaks mean that large-beaked birds can crack open much harder shells to get to the nutritious seeds.
Detailed explanation-4: -If the food source in an environment is altered, only the birds with beaks that can adapt to the new type of food will survive. Birds with beaks that are not as functional in obtaining the new type of food will eventually die off.
Detailed explanation-5: -The ancestors of this bird species encountered a tree with larger than average sized seeds. They discovered that by stretching their beaks, the beaks would get longer, and this increase was passed on to their offspring. Over time, the bird beaks became larger.