7 th Grade Science Classification Review 1 What

7 th Grade Science Classification Review

#1 What is a dichotomous key? A chart that classifies A: organisms according to their DNA A tool used to examine B: organisms and their structures to help identify the organism C: Nether D: Both

B. A tool used to examine organisms and their structures to help identify the organism

#2 Why do scientists classify organisms? To organize living A: things with similarities into groups Deciding which B: organisms will survive and reproduce C: Neither D: Both

A. To organize living things with similarities into groups

#3 Using the dichotomous key, identify the name of Bird X A: Certhidea B: Platyspiza C: Geospiza D: Camarhynchus

C. Geospiza

#4 Using the dichotomous key, identify the name of Bird Z A: Certhidea B: Platyspiza C: Geospiza D: Camarhynchus

D. Camarhynchus

#5 What is natural selection? Process by which organisms that are better A: suited to their environment produce offspring and reproduce B: The process by which scientists select organisms from nature C: D: None Both

A. Process by which organisms that are better suited to their environment produce offspring and reproduce

#6 The Galápagos Islands are famous for their many different species of finches all descended from a common ancestor. Which of the terms below would explain these differences? A: Natural selection B: Selective breeding C: Natural breeding D: None of these

A. Natural selection

#7 What is selective breeding? Movement of A: organisms from one place to another Humans choose organisms of the same B: species to create offspring with special traits C: Both D: Either

B. Humans choose organisms of the same species to create offspring with special traits

#8 Two processes that affect genetic traits. A: Mitosis and Meiosis B: Extraction and extinction C: Selective breeding and D: Migration and hybernation natural selection

C. Selective breeding and natural selection

#9 What is migration and why do animals migrate? A: The movement of organisms from one place to another to insure survival C: Neither Organisms remaining in one location as a B: means of insuring survival D: Both

A. The movement of organisms from one place to another to insure survival

#10 Monarch butterflies flying from Canada to Mexico is an example of ______. A: Natural selection B: Expedition C: Migration D: None of these

C. Migration

#11 What causes animals to be diverse or different from each other? Adapting to their A: environment is not important B: They must adapt to their C: Both D: environment Neither

B. They must adapt to their environment

#12 A chameleon has the ability to change colors when needed. How does this characteristic help it to survive? It helps the chameleon A: to blend in with its background It helps to insulate the B: chameleon from cold weather C: It allows it attract other D: chameleons None of these

A. It helps the chameleon to blend in with its background.

#13 A chameleon has the ability to change colors when needed. Which of these must be true in order for natural selection to influence this behavior? The behavior must A: attract other chameleons The behavior must B: affect the chameleon’s likelihood of survival The behavior must C: occur only during certain seasons D: None of these

B. The behavior must affect the chameleon’s likelihood of survival

#14 The skin of the fire salamander secretes a nerve toxin that can paralyze a potential predator. It also has black and yellow markings. What inference can be made about the fact that this salamander has black and yellow markings? A: It is trying to attract other salamanders C: Neither Its colorings are a B: warning to hungry predators to stay away. D: Both

B. Its coloring serve as a warning to hungry predators to stay away.

Which would be the best way to organize information when classifying animals according to animal group and recorded number extinct. #15 Line Graph Bar Graph Data Table A: Bar Graph B: Line Graph C: Data Table D: All of these

C. Data Table

#16 Which of the following characteristics in cattle is most likely to have occurred because of selective breeding done by humans? A: Cows that produce more milk C: Cows that are not domesticated B: Cows that eat grass D: Both

A. Cows that produce more milk

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