Define/explain 'Homologous structures'

Land bridges currently explain how the same/very closesly related species are found on separate continents (e.g. Brown bear). How/when are land bridges formed?

What is the name of the branch of science that seeks to explain the distribution of life on our planet?

Dolphins and shares are both aquatic (live in water) carnivores. They have very similar adaptations. Are these adaptations homologous or analogous structures? Give a reason for your answer.

Explain what divergent evolution is.

Which groups currently make up the camel family (Camelidae) and where are they found?

Whales and dolphins share a common ancestor with the hippo (diverged about 47 mya), they are essentially cousins. They look very different to each other. Is this an example of convergent or divergent evolution?.

Define/explain 'Analogous structures'

True or False: In this phylogenetic tree, Species F is more closely related to Species D than it is to Species A.

Are the following structures examples of homologous/analogous structures? Give a reason for your answer: Duck billed platypus (bill) -vs- Duck (billl)

Armadillos and Pangolins are not related. What possible reason can explain their similar adaptations and appearances?

The camel is the poster child for desert mammals. What evidence suggests that deserts where not the original habitat of their ancestors?