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Unit 5
The Diversity of Living Things
| Question | Answer |
|---|---|
| What is a stimulus? | Anything that causes a reaction or change in an organism. |
| What is a response? | An organism's reaction to a stimulus. |
| What is a behavior? | A set of actions taken by an organism in response to a stimulus. |
| What is homeostasis? | Maintaining a stable balance in the body. |
| What is a nerve response? | An electrical signal. |
| What is a hormone response? | A chemical signal. |
| How are stimuli detected? | Sensory receptors found in sensory organs. |
| Name some sensory organs. | eyes, nose, skin, whiskers, ears |
| Name two stimuli can a plant detect? | light, touch |
| What is an external stimulus? | A stimulus from outside the body. |
| Name some external stimuli. | temperature, sound, light, other organisms |
| What is tropism? | The movement of a plant in response to an external stimulus. |
| What is phototropism? | A plant's response to light. |
| What is geotropism? | A plant's response to gravity. |
| What is an internal stimulus? | A stimulus that comes from inside an organism's body. |
| Give an example of a response to an internal stimulus. | Fever or vomiting in animals or wilting in plants. |
| What are some behaviors that improve survival? | Fight or flight response |
| What behaviors help animals survive environmental changes? | migration and hibernation |
| What is evolution? | The process by which inherited traits of a population change over many generations. |
| What is variation? | The differences in features or behaviors in individuals within a species. |
| What is natural selection? | Organisms that have traits that allow them to survive are better able to reproduce and pass on those traits. |
| What is artificial selection? | Process by which humans breed organisms for certain characteristics. |
| What may aid in the survival of some organisms because they are not likely to be seen, hunted, and eaten by a predator? | Variation in color |
| Darwin's Theory of Natural Selection has four parts: | overproduction, genetic variation, selection, adaptation |
| Finches with smaller beaks feed on ? | small, soft seeds |
| Finches with larger beaks feed on ? | larger, harder seeds |
| Darwin's study of the finches found that the finches had beaks that were ... | better suited for the type of seeds available and they survived and reproduced. |
| What is fight or flight? | The response of running away or fighting from a stimulus perceived as dangerous. |
| What happens to an organism during hibernation? | Heart rate, breathing, and other body processes slow down to conserve energy. |
| Where do plants store energy rich food? | Specialized roots and stems called bulbs and taproots. |
| What is the describing, naming,and classifying of organisms? | Taxonomy |
| What is a tool with a series of questions that are answered in order to identify or name an organism? | Dichotomous Key |
| The number and variety of organisms living in an area | Biodiversity |
| Which biome has the greatest biodiversity? | Tropical Rainforest |
Created by:
lmsraiders
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