In: Biology
The hypothesis for the selection on seed traits:
The seed size makes the seeds either visible clearly or are get
blend in more with the small rocks. Thus, the larger seeds can be
grabbed more easily than the smaller seeds.
The hypothesis for selection on seeds and changing the
environment:
The seed size determines whether the seeds can go deep in the
ground or can be easily visible from above the ground. Accordingly
the smaller seeds go deep in the ground and are not visible whereas
the larger seeds can be easily see in from the surface of the
ground. Thus, the seed visibility in a given grass environment is
determined by its size.
The hypothesis for selection and a small population of
seeds:
Different birds have different abilities of collecting different
sized seeds, but smaller population of birds will effect the rate
of change.
The hypothesis for selection on beak traits:
Seeds can be easily grabbed by the chopsticks because of their
better grip on the wings. Thus, the beaks which are like chopsticks
will be able to hold the seeds very effectively and these types of
beaks containing birds will be selected by the nature for their
survival and reproduction.