What evolutionary term best describes segmentation in taxa

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Reference no: EM133934923

Questions

1. What evolutionary term best describes segmentation in the taxa of the previous question?

A. Analogy

B. Homoplasy

C. Reversal

D. Symplesiomorphy

2. The heartworms that infect the hearts of dogs and other mammals have an outer cuticle that is shed by ecdysis but no paired appendages. To which Phylum does the heartworm most likely belong?

A. Platyhelminthes

B. Arthropoda

C. Nematoda

D. Mollusca

3. Which of the following Phyla descriptions is incorrect?

A)Syndermata includes rotifers that crush food with a mastax.

B. Cnidaria have radial symmetry and may have polyp and/or medusa body forms.

C. Platyhelminthes are flatworms with a gastrovascular cavity (two-way gut).

D. Porifera have choanocytes and are diploblastic.

4. Which of the following represent an inaccurate description of Chordata synapomorphies?

A. The notochord is flexible rod that provides support and develops into the cartilaginous discs between vertebrae in more derived Chordata.

B. The dorsal hollow nerve cord develops from a plate of ectoderm that is dorsal to the notochord and develops in the central nervous system of more derived Chordata.

C. Pharyngeal gill slits are grooves in the pharynx that are involved in gas exchange in all Chordata.

D. The post-anal tail is used in locomotion in aquatic species and is highly reduced in some terrestrial species, such as humans.

Reference no: EM133934923

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