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Levels Of Organization
Test Description: This is a 7th grade study guide for the CRCT levels of organization topic.
Instructions: Answer all questions to get your test result.
1) Which organ system carries oxygen to the cells of the body?
A
nervous
B
circulatory
C
digestive
D
respiratory
2) Which list below correctly shows the levels of organization in an organism from left to right?
A
cells - tissues - organs - systems - organism
B
organs - tissues - systems - cells - organism
C
tissues - cells - systems - organs - organism
D
organism - cells - tissues - organs - systems
3) Which cell structure allows a plant to carry out photosynthesis?
A
cell wall
B
chlorophyll
C
nucleus
D
chloroplast
4) The organ system that uses blood to carry nutrients and oxygen to the cells of the body is the
A
reproductive system.
B
circulatory system.
C
cardiac system.
D
urinary system.
5) What is the job of mitochondria in plant and animal cells?
A
to break down wastes
B
to control what enters the cell
C
to break down food for energy
D
to store the cell 's genetic information
6) White blood cells help protect the body from illness by engulfing diseasecausing organisms. Which organ system produces white blood cells?
A
urinary system
B
circulatory system
C
skeletal system
D
immune system
7) What is formed by a group of cell s and tissues that work together to carry oul a specific function?
A
organelle
B
organ
C
organ system
D
orgamsm
8) One organ system includes the kidneys, bladder, and urethra. What is the purpose this system?
A
to protect the body from disease
B
to transport materials to cells
C
to produce offspring
D
to remove wastes from the body
9) Which organ system removes carbon dioxide wastes produced by cells from the body?
A
circulatory
B
digestive
C
nervous
D
respiratory
10) Which of these organelles breaks down food to release energy the cell can use?
A
endoplasmic reticulum
B
ribosomes
C
mitochondrion
D
cytoplasm
11) Which cell structure is MOST responsible for controlling what materials enter and leave the cell?
A
cell membrane
B
mitochondrion
C
cytoplasm
D
nucleus
12) Which organ system in humans makes sperm cells?
A
the female reproductive system
B
the excretory system
C
the nervous system
D
the male reproductive system
13) Which structure is the simplest level of organization in humans?
A
system
B
organ
C
cell
D
tissue
14) What fluid fills most of the in side of a cell?
A
water
B
chlorophyll
C
cytoplasm
D
plasma
15) Which of these organ systems controls and coordinates most body functions?
A
excretory
B
nervous
C
digestive
D
reproductive
16) Which of these processes of organisms needs carbon dioxide from the atmosphere?
A
denitrification
B
cellular respiration
C
digestion
D
photosynthesis
17) Which pair of organ systems work together to fight viral diseases such as the flu?
A
immune and excretory
B
digestive and reproductive
C
circulatory and immune
D
respiratory and nervous
18) Which organ system breaks down food into the nutrients cells need?
A
digestive
B
nervous
C
immune
D
excretory
19) What level of organization is made up of a group of similar cells that perform a specific function?
A
organelle
B
system
C
tissue
D
organ
20) Which of the following cell processes does NOT depend on nutrients?
A
response to stimuli
B
cell division
C
making needed materials
D
growth
*select an answer for all questions
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