CRCT

Review Questions

1. 1. Which metric unit would you use to

measure the mass of an object?

A. Meters B. Grams C. Inches D. Pounds

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2. Place the classification groups from largest

to smallest. A. Kingdom, Phylum, Family, Order, Genus,

Species, Class B. Kingdom, Phylum, Class, Order, Family,

Species, Genus C. Kingdom, Phylum, Class, Order, Family,

Genus, Species D. Kingdom, Species, Genus, Family, Order,

Class, Phylum

3. All organisms classified in the same

Order must also be classified in the same ____________.

A. Family B. Species C. Phylum D. Genus

4. Erin guesses that it is about 100

meters from our room to the office. She is ____________.

A. Measuring B. Inferring C. Estimating D. Hypothesizing

5. Which quotation is an example of a

hypothesis? A. “I think the Falcons will win the Super

Bowl next year.” B. “I think that Mr. Stokes is the best

science teacher ever.” C. “I think I will pass the science part of

the CRCT this year.” D. “I think high school will be fun

because I’ll get to pick my classes.”

6. Which of the cell parts listed below is

the “control center” of the cell?A. cell membraneB. cytoplasmC. nucleusD. cell wall

7. What is the primary purpose of

mitochondria in a cell?A. They store genetic information.B. They convert food molecules into energy

the cell can use.C. They trap sunlight and use the energy to

make food.D. They ship proteins and other substances

across the cell membrane.

8. Which of the following correctly lists an

organism’s structure from simple to complex?

A. cells, organs, tissues, organ systems, organismsB. cells, tissues, organs, organ systems, organismsC. tissues, cells, organs, organ systems, organismsD. tissues, organs, cells, organ systems, organisms

9. What is the function of the cell

membrane?A. Moves materials in and out of the cell.B. Stores materials such as water.C. Carries nutrients throughout the cell.D. Carries waste away from the cell.

10. Suppose there is a town called

Cellville. Which building in Cellville would have a purpose similar to the mitochondria of the cell?A. the libraryB. the water towerC. the power plantD. the police station

11. The END products of respiration are:

A. glucose and waterB. carbon dioxide, water, and energyC. oxygen, water, and energyD. glucose and carbon dioxide

12. Photosynthesis is the process in

which light energy is converted into food. Which of the following is produced by photosynthesis?A. lightB. heatC. proteinD. sugar

13. Where in the cell does respiration

occur?A. mitochondriaB. chloroplastsC. ribosomesD. cell membrane

14. Which statement best explains

osmosis?A. osmosis is the movement of waterB. osmosis is the diffusion of waterC. osmosis is the diffusion of water through

a mixtureD. osmosis is the diffusion of water through

a membrane

15. The cell membrane is to the cell as a

___________________ is to a classroom.A. deskB. power outletC. bookD. door

16. Diffusion is the movement of

molecules from an area of high concentration to an area of low concentration. Which of the following is an example of diffusion?A. Open a gate to allow horses to pass

through.B. Food coloring spreading through water.C. Carrying books to class.D. Walking against the flow of traffic.

17. Specialized cells that are similar in

structure and function are usually joined together to form ________.A. tissuesB. organsC. organ systemsD. organisms

18. Where would this cell most likely be

found? A. Bacteria C.leaf

B. Frog D.mushroom

19.1)In which plant cell structure does photosynthesis occur?

A. VacuoleB. ChloroplastC. CytoplasmD. Nucleus

20. New yeast grows on a parent yeast

organism, and breaks off when it is ready to form a new, separate organism. What type of reproduction is this an example of?A. Sexual reproductionB. MitosisC. RegenerationD. Asexual reproduction

21. Which of the following traits of a dog

is inherited from its parents?A. the presence of fleas in its furB. the color of its furC. the ability to sit up and begD. the habit of barking to go outside

22. Each form of a gene is called an allele. The

alleles for human blood type are A, B, and O. Both the allele for type A blood and type B blood are dominant. The allele for type O blood is recessive. What blood type will a person have if he inherits an allele for type A and an allele for type O?

A. Type AB. Type BC. Type ABD. Type O

23. DNA is essential to living organisms

because it —A. carries the genetic code.B. is a spiral helix.C. can prevent diseases.D. can break apart.

24. Poodles, like all dog breeds, are so closely

related to wolves that they can breed with them. What is the best explanation for why wolves and poodles do not look alike, despite being extremely close relatives?

A. Poodles have naturally evolved to look differently from wolves.

B. Wolves once resembled poodles, but quickly died out in the wild.

C. Wolves once resembled poodles, but they evolved to look differently.

D. Poodles are the result of people selectively breeding them for specific traits.

25. The scientific name of the

domesticated dog is Canius lupus. Which of the following animals would be most closely related to the dog?A. Felis domesticusB. Canius latransC. Felis lupusD. Vulpes cana

26. Ken owns a peacock farm. One day, a large batch

of eggs hatch and Ken discovers that a few of the chicks are white instead of blue. White chicks can be sold for $100 each, instead of the $50 that people pay for blue chicks. If Ken wants to raise more white peacocks in order to make more money, what should he do?

A. He should continue breeding the peacocks the same way.B. He should always be sure to cross blue peacocks with white

peacocks.C. He should isolate the white peacocks and allow them only to

breed with each other.D. He should bleach the blue peacocks white before allowing

them to breed with any white peacocks.

27.Mike and his three brothers all have brown hair. Mike's father has brown hair, too. Mike's mother, however, is the only family member that has red hair color. What likely conclusion can you draw about the gene for hair color?

A. The gene for red hair is dominant over the gene for brown hair.

B. The gene for brown hair is dominant over the gene for red hair.

C. Neither brown nor red are dominant since they both occur in the same family.

D. Red and brown genes are co-dominant

28.George Washington XIV decides that he likes a particular cherry tree in his yard. He makes a number of cuttings from this tall, white-flowered parent tree. The cuttings grow up into new cherry trees. What is true about the offspring cherry trees produced from cuttings?

A. The offspring trees will be inferior to the parent tree.B. The offspring trees are clones of the parent tree and

should look very similar.C. The offspring trees will vary greatly in height but

they will all have white flowers.D. Some offspring trees will develop white flowers,

while others will develop flowers of different colors.

29.If you cross-pollinate a tall pea plant with a short pea plant, the offspring would be:A. HeterozygousB. HomozygousC. PurebredD. Mutated

30.Sarah is home sick with a flu virus. What is her body doing to help her get better?

A. Her digestive system is breaking down the virus.B. Her reproductive system is making healthy new

cells.C. Her endocrine system is making hormones to

fight the virus.D. Her immune system is working to attack the

virus.

31.After blood is used, it is recycled back to the heart where it is eventually pumped back through the body. Before it can be reused, which organ must the blood pass through before it is returned to the rest of the body?

A. the stomach, because it must receive nutrientsB. the lungs, because it must be re-oxygenated C. the skin, because it must release excess heat

D. brain, because it must receive messages

32.All human body systems work together. What would happen to Samantha if one of her systems began to fail?

A. The other systems would continue to function as usual.

B. The system that is inefficient could be removed.C. The system directly beside the inefficient

system would take over the functions of the inefficient system.

D. The other systems would begin to fail eventually.

33.Use the list below to answer this question. carrying oxygen to the cells carrying carbon dioxide away from the cells carrying food to the cells carrying waste products away from the cellsWhich system is most responsible for all of the bodyfunctions listed above?

A. circulatory systemB. muscular systemC. nervous systemD. respiratory system

34.Which of these best completes the statement about the interaction of the digestive system with the circulatory system? The digestive system adds:A. nutrients to the bloodB. bile to the bloodC. oxygen to the bloodD. carbon dioxide to the blood

35. Where, in a cell, does respiration

occur?A. mitochondriaB. chloroplastsC. ribosomesD. cell membrane

36. Photosynthesis is the process in

which light energy is converted into food. Which of the following is produced by photosynthesis?A. lightB. heatC. proteinD. sugar

37. What type of cell MUST take in

carbon dioxide in order to stay alive?A. plant cellB. animal cellC. fungal cellD. yeast cell

38. The process of releasing energy from

food is calledA. plant transpirationB. human circulationC. body perspirationD. cell respiration

39. Food-producing and energy-

producing organelles in plants areA. chloroplasts and mitochondria.B. Golgi bodies and chloroplasts.C. lysosomes and Golgi bodies.D. mitochondria and lysosomes.

40. Which of the following would be an

example of a competitive relationship?A. a hawk and an owl B. a bee and a flowerC. a fish and seaweedD. a lion and a gazelle

41. Which of the following would be

biotic?A. waterB. producersC. soilD. the sun

42. Clownfish live among sea anemones for

protection and shelter. The sea anemone feeds on predators of the clown fish. What type of relationship is represented by a clownfish living near a sea anemone?

A. commensalismB. mutualismC. parasitismD. predator/prey

43. Hermit crabs live in shells that were

abandoned by snails. This neither helps nor harms the snails. What type of relationship is this?A. commensalismB. mutualismC. parasitismD. predator/prey

44. On this food web what is the original source of energy for the fox?