7th grade 9WKSCP

Even though plants are rooted in the ground, they still move, exert ​ (a)    , and do ​ (b)  

• force
• work

Plant cells have very strong cell walls that allow ​ (a)  

 to build up inside of the cell as water is absorbed. This pressure is called ​ (b)    . When turgor pressure is high enough in a cell, the cell walls become ​ (c)    and straight . As a result, the cell becomes ​ (d)    and the plant is able to stand tall and straight.

• pressure
• turgor pressure
• firm
• rigid

 A decrease in ​ (a)    push cell wall causes the cells to lose their ​ (b)    and ​ (c)    . This causes the plant to begin to droop, or ​ (d)   .

• pressure
• shape
• shrink
• wilt

The ​ (a)   system pumps blood throughout the body. The blood carries nutrients and oxygen to the body and removes the waste materials from organs.

• circulatory
• Respiratory

The ​ (a)    system works in conjunction with the circulatory system, by providing it with the oxygen that is needed by the body. The ​ (b)    system provides the body with a rigid support system that includes the bones

• respiratory
• skeletal

The muscles that are connected to the bones help the body move; the muscles are part of the ​ (a)    system. The  (b)  

 system breaks down the food to provide the body with nutrients and energy.

• muscular
• digestive

A ​ (a)    is something that causes an action to happen. 

​ (b)    stimuli are stimuli that begin outside the organism’s body. The 

​ (c)   is the stimulus that causes phototropism in plants.

• stimulus
• External
• internal
• Sun

An ​ (a)    stimulus is one that originates inside an organism’s body. If a plant doesn’t have enough water in its body cells, then the lack of water causes the plant to ​ (b)  

 

• internal
• wilt
• straight

In animals, some illnesses are caused by ​ (a)   stimuli. ​ (b)  

 is the response to motion sickness, food poisoning, or pregnancy. When the body temperature rises above the normal limits, the organism is said to have a ​ (c)  

  

• internal
• Vomiting
• fever
• external

​ (a)    is the passage of genetic instructions from parent to offspring. The genetic instructions are found in ​ (b)    within the DNA, which is contained in ​ (c)  

 inside the nucleus of the cells.

• Heredity
• genes
• chromosomes