Download Grade 6 Life Pretest

Grade 6 Life Pretest
Select the best answer to each question.
____
1. Which statement is true?
A. Tissues are made up of organs.
B. Organs are made up of organisms.
C. Cells are made up of organ systems.
D. Organ systems are made up of organs.
____
2. All living things depend on water for survival. In the organization of an organism, what is water?
A. a cell
B. an atom
C. an organ
D. a molecule
____
3. Lee collected images to show how the human body is organized, starting with a cell. Look closely at the
images Lee collected.
Unfortunately, Lee mixed up the images. What is the correct order showing the level of organization in the
body, starting with the lowest level?
A. 1 ® 2 ® 3 ® 4
B. 2 ® 4 ® 1 ® 3
C. 3 ® 1 ® 4 ® 2
D. 4 ® 3 ® 1 ® 2
____
4. Which of the following statements represents part of the cell theory?
A.
B.
C.
D.
All cells have nuclei.
All cells have a cell wall.
All organisms have many cells.
All cells come from other cells.
____
5. Part of the cell theory involves the process of the production of more cells. Which statement that is part of the
cell theory deals with how more cells arise?
A. Cells can grow.
B. Cells contain organelles.
C. Cells make up all living things.
D. Cells come from existing cells.
____
6. The cell theory applies to all types of cells, including the one shown in the diagram below.
According to the cell theory, what is the basic unit of all living things that is also shown in this diagram?
A. the cell wall
B. the cell itself
C. the cell membrane
D. the cell cytoplasm
____
7. Cells must be able to perform certain functions in order to survive. Which of the following must all cells do to
survive?
A.
B.
C.
D.
obtain energy
use oxygen
absorb wastes
continue growing
____
8. Isabel was looking for a word to use in describing homeostasis. After thinking about it, she found just the
right word. What was the word that she used to describe what happens as a result of homeostasis?
A. balance
B. growth
C. instability
D. shrinkage
____
9. All cells use similar processes to maintain homeostasis. However, there is one process that plants cells, but
NOT animal cells, use to maintain homeostasis. This process is shown in the diagram below.
What is this process?
A. cellular respiration
B. photosynthesis
C. elimination of wastes
D. extracting energy from food
____ 10. Which of the following correctly pairs a structure in a eukaryotic cell with its description?
A. nucleus; supports the cell’s shape
B. DNA; found in cytoplasm
C. cell membrane; separates a cell from its environment
D. cytoskeleton; consists of all genetic information needed by the cell
____ 11. Mariana drew a picture of a cell and showed it to Erik. The diagram below shows what she drew.
Erik compared it to other types of cells and identified it as an animal cell. How did Erik know this?
A. The cell has a nucleus.
B. The cell has a chloroplast.
C. The cell does not have a cell wall.
D. The cell does not have genetic material.
____ 12. Every animal cell and plant cell has mitochondria, but only a plant cell has chloroplasts. Why?
A. All cells must make their own food to obtain energy.
B. All cells must carry out photosynthesis, but only plants cell perform respiration.
C. All cells must reproduce, but only animal cells process sugars to obtain energy.
D. All cells must carry out respiration, but only plants cells produce their own nutrients.
____ 13. Which two body systems make movement possible?
A.
B.
C.
D.
the skeletal and muscular systems
the nervous and endocrine systems
the lymphatic and immune systems
the cardiovascular and respiratory systems
____ 14. The human body’s systems work together to maintain homeostasis. For example, one body system delivers
nutrients to each cell in the body. Another body system removes the wastes that the cells make. Which two
body systems perform these functions?
A. digestive system and excretory system
B. nervous system and circulatory system
C. circulatory system and excretory system
D. respiratory system and circulatory system
____ 15. Look closely at the diagram below.
Which is NOT a function of the body system shown in this diagram?
A. communication
B. movement
C. protection
D. support
____ 16. If a person eats food containing tapeworm eggs or larvae, tapeworms can enter the intestines. The following
picture shows a tapeworm.
Which type of organism is a tapeworm?
A.
B.
C.
D.
bacterium
fungus
parasite
virus
____ 17. Viruses, bacteria, fungi, and parasites can all be pathogens that may pose a threat to human health. What is a
pathogen?
A. an organism that normally lives in the body
B. an organism that can reproduce very rapidly
C. an organism that causes a disease in humans
D. an organism that spreads through the air or water
____ 18. Pathogens can infect the human body in several ways. Which is NOT a way that the human body becomes
infected by an infectious agent such as a fungus, bacteria, parasite, or virus?
A. from an animal
B. from drinking water
C. from lack of physical exercise
D. from touching a doorknob and then rubbing an eye
____ 19. Which of the following identifies the levels of classification in correct order?
A.
B.
C.
D.
domain, kingdom, phylum, class, order, family, genus, species
genus, species, domain, kingdom, phylum, class, order, family
domain, kingdom, genus, species, phylum, class, order, family
genus, species, phylum, class, order, family, domain, kingdom
____ 20. This branching diagram shows similarities and differences between several different animals. The
characteristics listed in this diagram help scientists classify these organisms into groups.
Which statement correctly describes the characteristics of the animals in the diagram?
A. Lizards, mice, and cats have lungs for breathing air as well as hair and mammary glands.
B. Lampreys, perch, and lizards have lungs for breathing air, but do not have hair and
mammary glands.
C. Lizards, mice, and cats have lungs for breathing air, and mice and cats have hair and
mammary glands.
D. Lizards, perch, and lampreys have hair and mammary glands, and perch and lampreys
have lungs for breathing air.
____ 21. Scientists classify organisms according to shared characteristics. When scientists assign a name to an
organism that has been classified, they use binomial nomenclature, a two-part naming system. For example,
the scientific name for a giant Pacific octopus is Enteroctopus dofleini. In binomial nomenclature, what level
of classification is represented by the first word? What level of classification is represented by the second
word?
A. first: kingdom; second: phylum
B. first: domain; second: order
C. first: species; second: genus
D. first: genus; second species
Grade 6 Life Pretest
Answer Section
MULTIPLE CHOICE
1. ANS: D
• A is incorrect because organs are made of tissues.
• B is incorrect because some organisms are made of different types of organ systems, and each organ system
is made up of different organs.
• C is incorrect because organ systems are made up of different organs. Each organ is made up of different
types of tissue, and each type of tissue is made up of different types of cells.
• D is correct because organ systems are made up of different organs.
STA: SC.6.L.14.1
2. ANS: D
A is incorrect because water is a molecule that fills up most of the cytoplasm of a cell.
B is incorrect because atoms combine with one another to form molecules, such as water, inside a cell.
C is incorrect because an organ is made of tissues which are made of cells which contain water.
D is correct because water is made from two different kinds of atoms.
STA: SC.6.L.14.1
3. ANS: B
A is incorrect because the heart is an organ made up of tissues.
B is correct because a group of similar cells that work together form a tissue, which is organized into an organ
that forms part of a body system.
C is incorrect because the body represents the highest level of organization.
D is incorrect because the lowest level of organization is cells, not tissues.
STA: SC.6.L.14.1
4. ANS: D
A is incorrect because only eukaryotic cells have nuclei.
B is incorrect because not all cells have a cell wall.
C is incorrect because an organism may be unicellular or multicellular.
D is correct because all cells divide to make more cells of the same kind.
STA: SC.6.L.14.2
5. ANS: D
A is incorrect because growth makes cells larger, it does not result in the production of more cells.
B is incorrect because the presence of organelles, such as the cell membrane, gives no information about more
cells arising.
C is incorrect because this statement indicates that cells form the basis of all organisms.
D is correct because this statement indicates that cells make more cells.
STA: SC.6.L.14.2
6. ANS: B
A is incorrect because not all cells contain a cell wall, which is part of plant cells.
B is correct because all organisms are made of one or more cells.
C is incorrect because a cell is part of cell theory, not just one of its structures, that identifies what makes up
all living things.
D is incorrect because the cytoplasm is the fluid-filled interior of the cell and not the basic unit of life.
STA: SC.6.L.14.2
7. ANS: A
A is correct because all cells need energy to perform all cell function.
B is incorrect because some cells, such as anaerobic bacteria, do not require oxygen to survive.
C is incorrect because all cells must be able to eliminate wastes, not absorb wastes, to survive.
D is incorrect because most cells do not grow continuously but stop growing once they have reached a certain
size.
STA: SC.6.L.14.3
8. ANS: A
A is correct because homeostasis results in a balanced set of conditions that are necessary to maintain
homeostasis in a cell.
B is incorrect because homeostasis is the process of keeping a stable environment in a cell and not the process
of a cell getting larger.
C is incorrect because homeostasis results in stability.
D is incorrect because shrinkage would result in the cell getting smaller, and homeostasis produces a state
where conditions in a cell are maintained within a certain range.
STA: SC.6.L.14.3
9. ANS: B
A is correct because only plant cells make nutrients through the process of photosynthesis.
B is incorrect because all cells carry out respiration.
C is incorrect because all cells must get rid of toxic materials to survive.
D is incorrect because all cell extract energy from nutrients by using intracellular digestion and cellular
respiration.
STA: SC.6.L.14.3
10. ANS: C
A is incorrect because the cytoskeleton supports the cell’s shape.
B is incorrect because DNA is found inside the nucleus in eukaryotes. It is located in part of the cytoplasm in
prokaryotes.
C is correct because the cell membrane separates the cell from its environment.
D is incorrect because DNA consists of the genetic information needed by the cell.
STA: SC.6.L.14.4
11. ANS: C
A is incorrect because both animal and plant cells contain a nucleus.
B is incorrect because there are no chloroplasts in the diagram.
C is correct because a cell wall, which is characteristic of a plant cell, is not shown.
D is incorrect because the cell has a nucleus where the genetic material is stored.
STA: SC.6.L.14.4
12. ANS: D
A is incorrect because animal cells must take in nutrients because they do not make their own food.
B is incorrect because animal cells do not carry out photosynthesis, and cellular respiration occurs in both
animal and plant cells.
C is incorrect because plant cells also use cellular respiration to obtain energy.
D is correct because cellular respiration occurs in the mitochondria of both plant and animal cells, while
photosynthesis occurs only in the chloroplast of plant cells.
STA: SC.6.L.14.4
13. ANS: A
• A is correct because the skeletal and muscular systems work together to make movement possible.
• B is incorrect because although both systems are involved in regulation and control, the endocrine system
does not directly impact movement.
• C is incorrect because the lymphatic and immune systems defend the body against disease.
• D is incorrect because the cardiovascular and respiratory systems work together to exchange oxygen and
carbon dioxide.
STA: SC.6.L.14.5
14. ANS: C
A is incorrect because the digestive systems supplies the nutrients, but it does not deliver them to the cells.
B is incorrect because the nervous system functions to coordinates the other systems.
C is correct because the circulatory system picks up the nutrients from the small intestines and then delivers
them to the cells. The excretory system eliminates the wastes.
D is incorrect because the respiratory system supplies oxygen and not nutrients.
STA: SC.6.L.14.5
15. ANS: A
A is correct because the nervous systems, and not the skeletal system, is involved in communication.
B is incorrect because the skeletal system works with the muscular system to allow the body to move.
C is incorrect because the skull protects the brain, and the ribs protect the lungs.
D is incorrect because the bones provide support for the body and allow it to stand upright.
STA: SC.6.L.14.5
16. ANS: C
• A is incorrect because a tapeworm is a parasite, not a bacterium.
• B is incorrect because a tapeworm is a parasite, not a fungus.
• C is correct because a tapeworm is a parasite. It lives in the intestines of humans and other animals, where it
derives nutrition and protection without benefit to its host.
• D is incorrect because a tapeworm is a parasite, not a virus.
STA: SC.6.L.14.6
17. ANS: C
A is incorrect because pathogens disrupt the normal functioning of the body.
B is incorrect because rapid reproduction is characteristic of bacteria and viruses, but not necessarily of fungi
and parasites.
C is correct because a pathogen is any organism that causes an infectious disease.
D is incorrect because a pathogen can spread through contaminated objects or from person to person.
STA: SC.6.L.14.6
18. ANS: C
A is incorrect because humans can get an infectious disease, such as ringworm, from animals.
B is incorrect because bacteria can thrive in water unless it is treated.
C is correct because lack of physical exercise can lead to noninfectious diseases, including heart problems.
D is incorrect because infectious agents can survive on doorknobs where someone touching it can pick up the
infectious agent on their fingers.
STA: SC.6.L.14.6
19. ANS: A
A is correct because it lists the classification of organisms from the broadest group to the most specific group.
B is incorrect because genus and species are out of order; they should be listed last.
C is incorrect because genus and species are out of order; they should be listed last.
D is incorrect because domain and kingdom should be listed first, and genus and species should be listed last.
STA: SC.6.L.15.1
20. ANS: C
A is incorrect because lizards do not have hair and mammary glands.
B is incorrect because lampreys and perch do not have lungs for breathing air.
C is correct because lampreys and perch do not have lungs for breathing air, and lampreys, perch, and lizards
do not have hair or mammary glands.
D is incorrect because these answers are the opposite of what is true; this answer choice might indicate a
misreading of the branching diagram, from right to left rather than left to right.
STA: SC.6.L.15.1
21. ANS: D
A is incorrect because kingdom and phylum are broad categories that are not used in the two-part naming
system.
B is incorrect because domain is a broad group that is not used to name specific organisms, and order is also
broader than the levels of classification used in binomial nomenclature.
C is incorrect because although these are the correct levels of classification, species is represented by the
second word and genus is represented by the first word.
D is correct because genus and species are the correct levels of classification and they are assigned to the
correct order of words in a scientific name for an organism.
STA: SC.6.L.15.1