LIFESCI 1 Lecture Notes - Lecture 23: Paraphyly, Feathered Dinosaur, Swim Bladder
Document Summary
Launchpad reading quiz week 9 (ch 47 48) Fish make up half of vertebrate species. Fins for steering and propulsion as compared to sharks who use fins for stabilization. Sea horses have mouths for suction feeding. Protogyny: sex change from female to male. She don"t need a man, she can become her own man . One male in the population that mates with the females. If the male dies, the largest female can become a male via hormones excreted by the dead male. Protandry: sex change from male to female. One female in the population that mates with all the males. When the female dies, the largest male becomes a female. Use their pectoral fins to crawl around. Have rudimentary lungs and gulp air to take in oxygen. Can live in very little to no water. Traits transitioned from one group to the next. Nicknamed a fishapod: shows both fish and tetrapod characteristics.
