Materials Computer 25 non-germinating peas

Vernier computer interface 250 mL respiration chamber

Logger Pro Thermometer

Vernier CO2 gas sensor Two 100 mL beakers

Bio Chamber 250 Paper towels

25 germinating peas

Procedures

1. Connect the gas sensor to the computer interface.

2. Obtain 25 germinating peas and blot them dry between two pieces of paper towel.

3. Place the germinating peas into the germination chamber.

4. Place the CO2 sensor in the respiration chamber as shown in figure 1

5. Wait 4 minutes, then begin collecting data. Record the CO2 concentration readings every minute for 10 minutes.

6. Fill the respiration chamber with water and then empty it. Thoroughly dry the inside of the respiration chamber with a paper towel.

7. Obtain 25 non-geminating peas and place them in the chamber. Repeat steps 3 – 7.

Data was collected for germinating seeds and dormant seeds. Which group was the control group?

the germinating seeds

the carbon dioxide levels

the dormant seeds

1. this system transports blood through the body and heart. 2. this system relates to the process by which an organism gets rid of its waste. 3.this system is responsible for movement of bones and fluids throughout the body. 4. this system receives and transmits information and responses. it depends upon electrical impulses created by the movement of charged particles. 5. this system relates to the process by which an organism replicates. sexually reproduction usually involves male cells (sperm) meeting female cells (eggs) to produce a fertilized egg or zygote. 6. this system gets oxygen to the cells of the body and rids the body of waste gases. some organisms use their skin. this is also a cell-level process. 7. this system relates to the structure and support of an organism. it is made of salts and proteins and found in vertebrate animals. 8. this is the system of organs which circulate blood around the body of most animals. 9. this system controls the glands that secrete hormones. 10. this organ system to protect the body from damage. itembank : system circulatory digestive system endocrine system excretory integumentary system muscular system nervous system reproductive system respiratory system skeletal system cardiovascular system