15) GIs We know the streamlined bodies shown in the accompanying figure are exam

Question

15) GIs We know the streamlined bodies shown in the accompanying figure are examples of homoplasy. If the following groups also had streamlined bodies, which of the groupings would give the most support to this body type being homologous? A) pterosaurs, dinosaurs, and birds B) lizards and elephants C) synapsids, monotremes, marsupials, rodents, and primates D) elephants only E) lizards, pterosaurs, dinosaurs, birds, synapsids, monotremes very early (stem) amniotes, which almost certainly harts(two atria, ane ventricle). Birds and mammals, however, are alike in 19) The common ancestors of birds and mammals were r ventricles). The four-chambered hearts of birds and having four-chambered hearts (two atria, two A) homoplasies B) the result of shared ancestry C) vestigial structures D) molecular homologies E:) structural ladistic approuch to systematics, which of the following is considered most important fon a 20) When using a classif A) overall phenotypic similarity B) shared ancestral characters C) shared denived characters Dy homoplasic ancestral characters E) the number of homoplasies

Explanation / Answer

Answer:

18.

Pterosaurus, dinosaurs, and birds,most support this body type.

Hence,option(A) is correct answer.

19.

Four chamber heart of birds and mammals are example of homoplasies.

Hence, option (A) is correct answer.

20.

The most important for cladistic approach of classification is shared ancestral characters.

Hence,option (B) is correct answer.

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