according to the website, evolutionary change and evolutionary relationships are represented by what?

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation

answer by yourhope:

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in which structure in the nucleus are ribosomes made?

b) nucleolus!

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if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.