THE MOLECULAR BASIS OF INHERITANCE
THE GENETICS OF VIRUSES AND BACTERIA
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
different beaks are adapted to eat different food
|
|
|
how all birds will go extinct
|
|
|
how all birds need different amounts of food
|
|
|
different beaks have no effect on survival
|
Detailed explanation-1: -Beaks are adapted to the type of foods a bird eats. A bird with a long pointy bill most likely does do scoop up food in the water whereas a bird with a flat or spoonbill probably does. A bird with a long skinny beak is adapted to reach into tight places for their food, like hummingbirds probing flowers for nectar.
Detailed explanation-2: -The observation that Galapagos finch species possessed different beak shapes to obtain different foods was central to the theory of evolution by natural selection, and it has been assumed that this form-function relationship holds true across all species of bird.
Detailed explanation-3: -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-4: -Birds’ beaks are the tools they have to use to gather food. The best adapted (fittest) to the available food have the best chance of surviving (not starving to death) and of having descendants. The different variations in these beak forms are each an experiment in natural selection.