15 Which Of The Following Actinopterygian Fishes Are Believed To Be The Most Recent To Have Evolved And Are Characteri 1 (45.31 KiB) Viewed 46 times
15. Which of the following Actinopterygian fishes are believed to be the most recent to have evolved, and are characterized by the presence of rapid and thick ossification of their endoskeletons? A. the sarcopterygian fishes (like coelacanths and lungfishes) B. the chondrichthean fishes (like acanthodians and sharks) C. the chondrostean fishes (like sturgeons and paddlefish) D. the holostean fishes (like bowfins and gar pikes) E. the teleost fishes (like perch and herring)
50. Chitin cell walls, flattened mitochondrial cristae, loss of flagella, presence of septate hyphae, mostly open mitosis, gain of the dikaryotic stage, and the formation of four oblong spores on a pedestal or basidium during meiosis (first appearing in the Devonian Period) characterize: A. the chytridiomycetes B. the basidiomycetes C. the microsporidia D. the zygomycetes E. the ascomycetes
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