Term
| What is a trait that helps organisms survive in its inviroment? |
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Definition
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Term
| What is a group of organisms that look alike and can reproduce among themselves. |
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Definition
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Term
| What is a sudden change in gene? |
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Definition
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Term
| What is the process by which species change over time? |
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Definition
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Term
| What is a trait that helps an organism survive in its inviroment? |
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Definition
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Term
What term means:
No longer found as a living species? |
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Definition
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Term
| What are two types of fossils found in rocks? |
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Definition
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Term
| What are the remains or traces of a once-living organism? |
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Definition
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Term
| What are some examples of homologous structures? |
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Definition
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lion's foreleg
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bat's wing
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dolphin's flipper
All have similar bone structure. |
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Term
What is an example of a
vestigial structure? |
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Definition
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Term
| What are homologous (ho/mol/o/gus)structures? |
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Definition
body parts that have the
SAME basic structure |
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Term
| What are vestigial (ves/ti/gial) structures? |
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Definition
body parts that seem to have
NO FUNCTION or purpose
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Term
What is
survival of the fittest?
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Definition
| some variations make it easier for some organisms to survive |
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Term
| What is struggle for existence? |
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Definition
| the offspring compete for things they need to survive - only a few live |
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Term
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Definition
| differences in traits among individuals in a species |
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Term
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Definition
| each species produces more offspring than can survive |
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Term
What is
evolution of new species? |
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Definition
| individuals with favorable traits reproduce and pass the traits to their offspring |
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Term
| What do all living things need to survive? |
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Definition
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living space
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food
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water
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shelter
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Term
| What is one reason that many offspring may not survive? |
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Definition
because members of a species must compete for the resources (food, water, shelter) in their living space
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Term
| What term means the area where a type of animal or plant population is found? |
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Definition
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Term
What determines the size of a
population's range? |
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Definition
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Term
What term means the largest population size that can be supported by the available resources of an area?
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Definition
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Term
| What type of organisms use the sun's energy to make their own food? |
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Definition
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Term
| Name the types of consumers |
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Definition
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herbivore
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carnivore
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omnivore
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Term
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Definition
an animal that only eats
dead organisms |
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Term
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Definition
| an organism that breaks down the wastes or remains of other organisms |
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Term
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Definition
| the struggle among organisms for resourses in an ecosystem |
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Term
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Definition
| the relationship in which an organism kills and eats another organism |
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Term
| define: symbiosis (sym/bi/o/sis) |
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Definition
| the relationship between different species living in close association with one another |
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Term
| Name some adaptations that help protect organisms against predators |
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Definition
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camauflage
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protective covering
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warning coloration
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mimicry
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Term
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Definition
when an organism looks like its environment so it can hide
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Term
| What is an example of mimicry |
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Definition
| A species may copy the warning coloration of another species as protection |
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Term
| How are warning colorations an adaptation? |
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Definition
| Bright colors usually mean poison, warning predators not to eat them |
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Term
| Name some natural disturbances that can upset the balance of an ecosystem. |
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Definition
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Term
Describe a balanced ecosystem.
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Definition
The size of the population may go up or down, but the average size of the population stays the same over time.
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