Carefully compare the flies' features (characteristics) and identify the traits that are present or absent for each animal. Fill out the table below to arrange the data, please put a check mark (O) if the trait is present. Trait Species A Species B Species C Species D Species E Large Wings Stinger Wing veins Bulge eyes No leg bulbs

Megan, a paleontologist, is working with a new fossil collection of trilobites from the paleozoic era. Part of her research is figuring out how many species of trilobites are in this new collection. What species concept will Megan not be able to use while doing her work? Biological species concept O Phylogenetic species concept O Megan will be able to use all of them Morphological species concept O Megan will not be able to use any of them

Use the following phylogenetic tree to help determine if the provided examples below are homologous structures or analogous structures. Figure 27.10 ANCESTRAL PROTIST Metazoa 770 million years ago ©2014 Pearson Education, Inc Eumetazoa 680 million. years ago 670 million years ago Bilateria Deuterostomia Lophotrochozoa Ecdysozoa The worm shape of a hemicordata and the worm shape of a nematoda Porifera Ctenophora Cnidaria The scales of a fish (chordata) and the scales of a scaleworm (annelida) The shell of the brachiopoda and the shell of the mollusca The shell of a mollusca and the hard outer surface of the arthropods Hemichordata Echinodermata The holes in human skin (pores) and the hole in the body of a porifera Chordata Platyhelminthes Rotifera Ectoprocta Brachiopoda EXAMPLE The round shape of an Echinodermata and the round shape of a ctenophora Mollusca Annelida Nematoda Arthropoda The trochophore larval stage of a Mollusca and the trochophore larval stage of an annelida. Homologous…

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