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Activity 2 Mind Workout

Directions: Answer the following question shoulders Wirine your fingerswers on a separate sheet of paper or at the
back page of your module.

1. Dolphins and fishes have relatively comparable body shapes. Is it more likely that this feature is a
homologous or analogous trait? Explain your answer.

2. Why is it so important for scientists, before building phylogenetic trees, to differentiate between homologous
and analogous features?

3.Explain the significance of mitochondrial DNA sequencing in tracing evolutionary relationship of organisms
belonging to the same species.​

Sagot :

Irenesicot41idn

Answer:

Dolphins and fish have similar body shapes. Is this feature more likely a homologous or analogous trait?

Explain your answer.

a. Analogous-Dolphins are mammals and fish are not, thus their evolutionary paths are quite separate. They have similar body shapes because of their similar environment.

b. Analogous-Dolphins and fish are both vertebrates, thus they share an evolutionary history, causing them to have similar body shapes.

c. Homologous-Dolphins and fish are both vertebrates, thus they have a similar recent evolutionary history, causing them to have similar body shapes.

d. Homologous-Dolphins are mammals and fish are not, thus their evolutionary paths are quite separate. They have similar body shapes because of their similar environment.

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