Answer the question Essay Example | Topics and Well Written Essays - 250 words - 22

Answer the question - Essay Example the male sperms develop to be small, swifter and have a short life span while the female eggs grow bigger, less mobile and have a long lifespan (Neal 336). The four alternative reproductive strategies include (Sloman, Rod and Balshine 300): (1) Reversible ART: this is where independent animals can change forth and back between patterns; (2) Sequential ART: the independent animals change from one scheme to another at a particular time in their life span; (3) Plastic ART: in this strategy, the independent animals can change the plan throughout their life; (4) Fixed ART: in this strategy, independent animals adopt a single scheme throughout their life. 5) The gross anatomy of sharks has not changed much over the last 360 million years. List five morphological or physiological characteristics of sharks that have made the shark form such an evolutionary "success". For each characteristic state the advantage that it gives - Sharks swim with their mouths open with gill rakers upright and enlarged across the openings between the gill arches to build a sieve. The sharks are able to feed on zooplankton, small fish and fish eggs (Fowler, Sharks, Rays & Chimaeras 253). 6) What are the problems with our current Linnean system of vertebrate classification? How have new cladistic and phylogenetic techniques helped us to improve our knowledge of vertebrate evolutionary relationships? The current classification of Linnaeu’s system puts reptiles and amphibians in different classes that indicate their maximal variety of biological characteristics and lifestyles (Schneider, Krasny, Morreale & Tolpa 7). The phylogenetic technique gives evolutionary trees that provide the basis for biodiversity or comparative of a broad range of evolutionary difficulties. The cladistics assists in the production of phylogenetic information utilized to generate the evolutionary trees (Laurin