GO GET YOUR TEXTBOOK. Grab the sheet off of the front table. Put your “PLANT ADAPTATIONS” homework in the basket. If you were absent yesterday grab one and turn in tomorrow. Answer the following question in the back of your science notebook: What is the difference between a compound and a mixture?

Survival of the Fittest SPI 0807.5.2, SPI 0807.5.3

TYPES OF ADAPTATIONS Structural (inherited traits of body structure or physical appearance.) - a polar bear can survive in the frigid temperatures of the tundra because its fur and blubber (fat) keep it warm. - reptiles have scales on their skin that keep water from escaping through helping it to survive in dry, hot conditions. -some frogs and butterflies are brightly colored to warn predators that they are poisonous.

Types of Adaptations Behavioral- inherited traits that allow animals to know how to act and behave in certain ways. -increase the likelihood that the animal will be able to survive and reproduce. -migration and hibernation are examples.

Types of Adaptations Physiological- An adjustment within the cell, or tissues, of an organism in response to an environmental stimulus resulting in the improved ability of that organism to cope with its changing environment. The Great Horned Lizard shoots blood out of his eye to escape predators.

Horned Lizard List one structural, behavioral, & physiological adaptation (total of 3) above the 3 pictures in your notes that you observe during the video. https://www.youtube.com/watch?v=xodVcgJ8bc0

NATURAL SELECTION

Natural Selection Natural selection is the process by which organisms that are best suited to a particular environment survive and reproduce. In other words, nature “selects” these organisms for survival. The fittest individuals live to pass on their traits to the next generation allowing it to adapt to a changing environment, and survive.

Variations Variations are differences that exist naturally among the members of a species. Because of variations, some are better suited than others to survive in their environment.

Peppered Moth During the Industrial Revolution, factories gave off lots of black soot. The soot coated the tree trunks and made them darker. The dark moths were better adapted to the change in the environment. At one time in England, the light colored moths blended in with the light colored trees in their environment. This made it difficult for predatory birds to see the moths.

The variations among the moths allowed the species as a whole to survive. Had there been no variations in genes for color, the species might have become extinct.

Variations In a varied population, the species is more likely to survive.

Checks for Understanding 1. A certain plant species has evolved to contain a bad tasting chemical. Which of these is the MOST LIKELY outcome of this adaptation? A. animals are less likely to eat the plant. B. the plant is able to survive in many different environments C. The chemical aids in photosynthesis. D. Animals are more likely to eat the plant.

Checks for Understanding 2. The Burmese python, like other snakes, has a loosely hinged jaw. Which of these best describes an advantage of this adaptation? A. This type of jaw allows the snake to scoop up water from ponds and rivers. B. This type of jaw allows the snake to climb and live in trees. C. This type of jaw provides no advantages. D. This type of jaw can be stretched wide, allowing the python to swallow animals that are larger than its head.

Checks for Understanding 3. Which diagram most likely shows an adaptation that increases the chances of survival of a plant in a hot, dry climate?

Checks for Understanding 4. A muskox is a large, heavy mammal. It has short legs and it is covered in long, thick hair. Based on its characteristics, in which environment is a population of muskox best suited to live? A. tundra B. desert C. wetland D. rain forest

Checks for Understanding 5. A Beluga whale lives in cold salt water. Which of the following characteristics is an adaptation for cold water? A echolocation B large fins to swim with C a thick layer of blubber fat D a long ridge along their back

6. Why do some organisms like butterflies have bright colors? A. to make it easier to find food. B. to warn predators that they are poisonous. C. to help them adapt to flying long distances. D. to make it easier for them to blend into their surroundings.

7. Which adaptation of black bears best helps them survive cold winters? Having a large home range Being able to hibernate Eating both plants and animals Having sharp teeth and claws

Ch. 3 Sec. 4 Turn to page 84. This assignment is due tomorrow. You do not have to cite evidence.