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Where did we leave off?

Where did we leave off?. Types of Adaptations. 2. Physiological : inherited traits that involve the regulation of bodily processes and internal functions—metabolism, blood clotting, hibernation Toxic secretions. Poisonous Frog.

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Where did we leave off?

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  1. Where did we leave off?

  2. Types of Adaptations 2. Physiological: inherited traits that involve the regulation of bodily processes and internal functions—metabolism, blood clotting, hibernation • Toxic secretions Poisonous Frog http://www.pbs.org/wnet/nature/episodes/christmas-in-yellowstone/video-hibernating-bear/4454/

  3. Types of Adaptations 3. Behavioral: inherited traits that are instinctual reactions to the environment—migrations, hunting, tracking, breeding, defenses, nursing Salamander video 5th hour: Cheetah Video

  4. Case Study:Where is the Moth? Sudden change in the environment due to increased pollution from the Industrial Revolution. Kills off most lichen on trees. Trees darkened by soot.

  5. Case Study: Industrial Melanism • What is the selection pressure? • What specific type of adaptation does the moth population rely on? • What type (directional, stabilizing, or disruptive) of selection is occurring in the gene pool?

  6. Hey wait a second… • I’ve seen a lot of inherited traits that seem in opposition to the adaptations just mentioned… • To ADVERTISE! • To COMPETE! • Survival is only ½ of fitness! • What about reproduction?

  7. Sexual Selection—acts on the ability of an organism to obtain and copulate with a mate Females Choose Males Compete • Looking for the best genes • High investment • Limited reproduction • Some can reject unwanted • sperm • Gain mate attention: ornamentation, visual, mating displays and songs • Battle for territory and/or a mate: physical structures, size Sexual dimorphism

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