14) Tree 1 543 2 Tree 2 in the accompanying phylogenetic trees, numbers represen

Question

14) Tree 1 543 2 Tree 2 in the accompanying phylogenetic trees, numbers represent specles and the same species are shown in both trees. Which two species are represented as sister species in Tree 2 but are not shown as sister species C) 3 and 4 in Tree 1? D) 4 and 5 E) 5 and 6 B) 2 and 3 A) 1 and 2 are based on shared derlved characteristics, which of the following traits is useful 15) Given that phylogenies in generating a phylogeny of species W, X, Y, and z Species 2 A. B) Trait 2 C) Trait 3 D) Traits 1, 2, and 3 A) Trait 1 16) lchthyosaurs, now extinct, were aquatic reptiles with dorsal fins and tails, similar to those of fish. Their most recent ancestors were terrestrial reptiles that had neither dorsal fins nor and tails of ichthyosaurs and fish are aquatic tails. The dorsal fins A) adaptations to a common environment and examples of convergent evolution B) homologous structures C) adaptations to different environments D) adaptations to a common environment and homologous structures Both ancestral birds and ancestral mammals shared a common ancestor that was a terrestrial vertebrate. Today, penguins (which are birds) and seals (which are mammals) have forelimbs adapted for swimming What term best describes the relationship of the bones in the forelimbs of penguins and seals, and what erm best describes the flippers of penguins and seals? A) homoplasy, homoplasy Chomoplasy; homology B) homology; homoplasy D) homology; homology

Explanation / Answer

14) Species 3 and 4 are not sister species in tree 1 because they emerge as different lineage

15) trait 1,2 and 3. Trait 1 is common among all species, on the basis of tree 2 they evolve in two different lineages and on basis of trait 3, they evolve further.

16) fins and tails are anaologous structure among fish and ichthyosorous which arise by convergent evolution thus they are adaptations to a common environment and examples of convergent evolution

17) homology; homoplasy

same structure of the bone in the forelimb but different function

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