Download 7th Grade Final Exam Review

7th Grade Final Exam
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
____
____
____
____
____
____
____
____
____
1. What are chromatids?
a. identical strands of chromosomes
b. identical daughter cells
c. doubled rods of condensed chromatin
d. pigments that absorb the energy in sunlight
2. Which term refers to the diffusion of water molecules through a selectively permeable membrane?
a. osmosis
b. engulfing
c. active transport
d. passive transport
3. Which term refers to the movement of materials through a cell membrane without using the cell’s energy?
a. concentration
b. collision
c. active transport
d. passive transport
4. One role of fats is to
a. link together to form proteins.
b. form part of the cell membrane.
c. act as helper molecules.
d. break down nutrients.
5. Which genetic disorder causes the body to produce unusually thick mucus in the lungs and intestines?
a. hemophilia
b. Down syndrome
c. cystic fibrosis
d. sickle-cell disease
6. What is the purpose of the Human Genome Project?
a. to identify the DNA sequence of every gene in the human genome
b. to clone every gene on a single chromosome in human DNA
c. to cure genetic diseases
d. to inbreed the best genes on every chromosome in human DNA
7. Hemophilia is caused by a(n)
a. recessive allele on the X chromosome.
b. extra chromosome.
c. dominant allele.
d. codominant allele.
8. What process results in genetically different bacteria?
a. binary fission
b. respiration
c. conjugation
d. asexual reproduction
9. A colored substance that helps to keep the skin from burning is:
a. the dermis
c. melanin
b. the epidermis
d. a follicle
____ 10. Most mechanical digestion takes place in the
a. liver
b. esophagus
c. stomach
d. small intestine
Modified True/False
Indicate whether the sentence or statement is true or false. If false, change the identified word or phrase to make the
sentence or statement true.
____ 11. Tissues perform more complex jobs than organs. _________________________
____ 12. The cardiovascular system consists of the heart, blood vessels, and lymph. _________________________
____ 13. Water from the digestive system is absorbed in the large intestine. _________________________
____ 14. When Mendel crossed purebred short plants with purebred tall plants, all of the offspring were short.
_________________________
____ 15. A Punnett square shows all the possible combinations of alleles resulting from a cross.
_________________________
____ 16. Alligators and crocodiles are classified in the same order and therefore probably have different evolutionary
histories. _________________________
____ 17. In a controlled experiment, a scientist carries out two tests that are identical in every respect except for one
factor. _________________________
____ 18. Even if a gene has multiple alleles, a person cannot have more than three of those alleles.
_________________________
____ 19. Traits that have many different phenotypes, such as height and skin color, are often controlled by a single
gene. _________________________
____ 20. A male is represented by a square in a pedigree. _________________________
Completion
Complete each sentence or statement.
21. Organs join to form a(n) ____________________ that performs a major function.
22. The forelimbs of a bird and a mammal are examples of ____________________ structures.
23. Cardiovascular health can be maintained by strengthening the heart muscle through regular
____________________.
24. A chart used to predict results of genetic crosses is known as a(n) ____________________.
25. A set of three bases codes for one specific ____________________ in a protein.
26. A selection of DNA has the base sequence TGAG. The corresponding section of a messenger RNA molecule
will have the base sequence ___________________.
27. All funguslike protists are able to ____________________ at some point in their lives.
28. Fungi produce lightweight spores that are surrounded by a(n) _________________________.
Short Answer
Use the diagram to answer each question.
29. Is the cell shown a bacterial cell? Explain your reasoning.
Use the diagram to answer each question.
30. Suppose the test tube contained plant cells instead of red blood cells. What would probably happen to the
cells if they were placed in beaker A?
Use the diagram to answer each question.
31. In the F1 generation, what is the genotype of the offspring? What is their phenotype?
Use the diagram to answer each question.
32. Identify structure E and describe its function.
Use the diagram to answer each question.
Table of Classification Labels
Classification
Level
Aardwolf
Gray Wolf
Coyote
Lion
Blue Whale
Kingdom
Animalia
Animalia
Animalia
Animalia
Animalia
Phylum
Chordata
Chordata
Chordata
Chordata
Chordata
Class
M ammalia
M ammalia
M ammalia
M ammalia
M ammalia
Order
Carnivora
Carnivora
Carnivora
Carnivora
Cetacea
Family
Hyaenidae
Canidae
Canidae
Felidae
Balenopteridae
Genus
Proteles
Canis
Canis
Panthera
Balaenoptera
S pecies
Proteles
cristatus
Canis lupus
Canis latrans
Panthera leo
Balaenoptera musculus
33. Based on their kingdoms, what are the shared characteristics of all the organisms in the table?
Use the diagram to answer each question.
34. Which pairs of individuals in the pedigree have children?
35. Which individuals have the trait that is traced by the pedigree?
Use the diagram to answer each question.
36. Identify structures A and B. What do these structures contain?
37. Explain what is happening in Step 3.
Use the diagram to answer each question.
38. Identify the structures labeled C in the diagram and describe their function.
Essay
39. Animals do not make their own food from energy in sunlight. Explain why they still depend on the sun for
energy.
40. Contrast mitochondria and chloroplasts.
41. What are Linnaeus’ two major contributions to taxonomy?
42. A person tells you that two organisms belong to the same family but to different classes. Can that information
be correct? Explain.
43. Describe the three types of funguslike protists.
44. Explain the difference between the 3 types of muscle tissue and give examples of each.
45. Explain 5 important functions of the skeleton and of the skin.
46. Explain the process of how blood moves from the lungs, and through each chamber of the heart to the body.