Where did we leave off?

Types of Adaptations2. Physiological: inherited traits that

involve the regulation of bodily processes and internal functions—metabolism, blood clotting, hibernation

▫Toxic secretions

http://www.pbs.org/wnet/nature/episodes/christmas-in-yellowstone/video-hibernating-bear/4454/

Poisonous Frog

Types of Adaptations3. Behavioral: inherited traits that are

instinctual reactions to the environment—migrations, hunting, tracking, breeding, defenses, nursing

Salamander video5th hour: Cheetah Video

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.

Case Study: Industrial MelanismWhat 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?

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?

Sexual Selection—acts on the ability of an organism to obtain and copulate with a mateFemales 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