Question

Bear Seal Sea lions Dog Cat Hyaena loss of ear flaps retractable claws abdominal testes short tail 9) In the above tree, assume that the ancestor had a long tail, ear flaps, external testes, and fixed claws. Based on the tree and asssuming that all evolutionary changes in these traits are shown what traits does a sea lion have? a) long tail, ear flaps, external testes, and fixed claws b) short tail, no ear flaps, external testes, and fixed claws c) short tail, no ear flaps, abdominal testes, and fixed claws d) short tail, ear flaps, abdominal testes, and fixed claws e) long tail, ear flaps, abdominal testes, and retractable claws Psilotum Oak Yew Fern Lepidodendron Clubmoss loss of leaves tree tree seeds true leaves 10) In the above tree, assume that the ancestor was a herb (not a tree) without leaves or seeds Based on the tree and assuming that all evolutionary changes in these traits are shown, which of the tips has a tree habit and lacks true leaves? a) Lepidodendron b) Clubmoss c) Oak d) Psilotum e) Fern

Answer 1

9) Ans- sea lion have short tail because at the branch point near to the ancestor branch evolve short tail.also they have ear flaps because loss of ear flaps is evolved in seal only.sea lion have fixed claws same because of evolution of recratable claws is occurred in cat according to phylogenetic tree.so sea lion have short tail,ear flaps, abdominal testes and fixed claws.