Question

In: Biology

1. In your own words, describe the difference between homologous vs. homoplastic traits. 2. What does...

1. In your own words, describe the difference between homologous vs. homoplastic traits.

2. What does convergent evolution indicate or tell you about a trait? Describe at least two example of this type of trait.

3.Are pennate antenae a synamorphic or pleisiomorphic of stalked eye beetles? Why?

Solutions

Expert Solution

1.The difference between homologoushomologous and homoplastic is that ,homologous trait is developed from a common ancestor, while homoplastic, trait was independently developed and does not have a common ancestor. Homologous traits often results in diveregent evolution and homoplastic evolution leads to convergent evolution.

2.Convergent evolution is the independent evolution of similar features in species of different periods in time. Convergent evolution creates analogous structures that contains similar form or function but are not present in the last common ancestor of those groups.For example of the similar nature of the wings of insects, birds, and bats. They serve the same function and are similar in structure, but each evolved independently.Another good example of convergence is the evolution of edible fruits such as apples. These pomes incorporate five carpels and their accessory tissues to form the apple's core,which is surrounded by structures from outside the fruit, ie, the receptacle or hypanthium. Other edible fruits include other plant tissues,like,the fleshy part of a tomato is the walls of the pericarp. This is an implication of convergent evolution under selective pressure, in the above, case the competition for seed dispersal by animals through consumption of fleshy fruits.

3.Pennate Antanae is pleisiomorphic in stalked eye beetel since it is an evolved present in all the members of the group.


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