While looking at some seawater through your microscope, you spot the egg of an unknown animal. which of the following tests could you use to determine whether the developing organism is a protostome or a deuterostome? a test to see whether the embryo

A test to see whether the embryo exhibits spiral cleavage or radial cleavage.

Eight-cell stage in the development of animals differ between protostomes and deuterostomes. Cleavage of Protostomes is spiral and determinate, while in Deuterostomes is radial and indeterminate.

The stage of coelom formation also differs: in Protostomes it is schizocoelous-mesoderm forms coelom; in Deuterostomes it is enterocoelous-archenteron form coelom.

Final and main dfference:

•Protostomes-mouth develops from the blastopore

•Deuterostomes-anus end develops from blastopore.

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.