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LS 3 & 4 Test Review
SCIENCE
Question | Answer |
---|---|
Selection Pressure | The environment removes organisms w/traits that do not help the organism survive & reproduce. |
Adaption | A trait that helps improve the chance of survival and reproduction. |
Extinct | When extreme pressure causes an organism to die off. (A species that is gone forever.) |
Evolution | The changes in frequency of traits in a population over time. |
Theory | A general statement that is supported by many scientific observations. (Predictions of what might happen between the independent & dependent variables.) |
Example of a PREDATOR: | LION or COYOTE (eats other animals. |
Example of a PREY: | ZEBRA or RABBIT (eaten by other animals). |
Example of a "Structural adaption" of a dog: | Adaptations that are part of an organisms physical makeup. (Sharp teeth, Sense of smell) Track dogs (GREY HOUND) - long legs, speed, light weight make it a key dog. |
Example of a "Behavioral" adaption of a dog: | Adaptions that cause an animal to act in a specific way. (Herding, Barking). Guide dog (GOLDEN RETRIEVER)for the blind people. Smart, calm, patient, and loyal. |
A drought resistant wheat variety scientists discovered in Australia by combining Australia wheat with American wheat is called: | Selective Breeding/artificial selection. Cross Breeding. |
Asexual Reproduction | 1 parent cell divides into 2 cells & each of the new cells has the same genetic material as the parent. |
DNA | The genetic material in a cell that stores & transmits genetic info. from 1 generation to the next. |
Genetic Engineering | Changing the genes of organisms. |
Cell division (Mitosis) results in two genetically ___________ daughter_________. | Identical/Daughter |
What are two MAJOR reasons cells need to reproduce? | Make and grow new cells and make new organisms. |
Artificial Selection | Humans are the selection pressure. - Changes the population to fit the criteria set by people. |
Natural Selection | The environment is the selection pressure. Selects traits that allow organisms to survive. |