Notes Science Tennessee SPI Objective: Adaptations Notes Science Tennessee SPI Objective: Analyze structural, behavioral, and physiological adaptations to predict which populations are likely to survive in a particular environment. Instructions for Students 1) Make sure you view this presentation in slideshow mode. 2) If you need help, please communicate with your teacher. 3) If needed, there are videos about how to do this on YouTube. Essential Question How do species adapt their behavior and their physical structure in order to survive? Check for Understanding Identify an organism’s adaptations that enable it to survive and/or thrive in a specific environment.

Definition: To adapt means to change in order to survive and/or thrive in a specific environment. Two types of adaptations: 1) Behavioral: 2) Structural: what an organism does concerns the shape and form of the body Question: See the insects in the picture below? Can you see them? Is this mainly behavioral or structural adaptation? This is called camouflage This is mainly structural adaptation because these insects have adapted by developing bodies that look like thorns.

Two types of adaptations: 1) Behavioral- what an organism does 2) Structural- concerns the shape and form of the body Look at the image of the hibernating bear Question: Is this a mainly a behavioral or structural adaptation? This is behavioral because it is an action that the animal does.

Two Key Behavioral Adaptations requires 2 parents (male and female) 1) Sexual Reproduction: requires 2 parents (male and female) Advantage: Genetic diversity which results in greater adaptability Disadvantage: Large amount of time and effort to find a mate Advantage: No time and effort needed to find a mate Disadvantage: Lack of genetic diversity which results in less adaptability 2) Asexual Reproduction: requires only 1 parent Reproduces sexually Dogs Hydra Reproduces asexually

Notes SPI 0807.5.2 Adaptations 1) When environmental changes occur… Science 1) When environmental changes occur… …organisms must change (adapt) by either changing their behavior or changing their body structure or both. 2) The process that drives this… … is called natural selection. 3) Changes and variations in populations result from… …sexual reproduction (over many generations) and changes in the environment. 4) Changes and variations also result from… …genetic mutations (over many generations) and changes in the environment.

Four Phases of Natural Selection Overproduction Too many offspring are born. Phase 1 Genetic Variation in a Population Offspring are born with a variety of traits. Some offspring are better suited to survive than others. Phase 2 Struggle to Survive Offspring compete for limited resources. Many die or are eaten by predators. Phase 3 Successful Reproduction The stronger, smarter, faster offspring survive to breed with each other. Phase 4

SPI 0807.5.2 Adaptations Review Science

SPI 0807.5.2 Adaptations Review Science

SPI 0807.5.2 Adaptations Review Science

SPI 0807.5.2 Adaptations Review Science

SPI 0807.5.2 Adaptations Review Science