UNIT 6 AND UNIT 10
STUDY GUIDE – Answer Key
1. Ecological succession and equilibrium share a relationship in the environment, what is it?
Succession helps to maintain equilibrium in an ecosystem
2. What is the main contributing factor to an ecosystem’s sustainability?
Increase in biodiversity
3.
What is the role of a pioneer species in primary succession?
Change bare habitat into one that is suitable for other organisms
4. A species that is responsible for primary success in an ecosystem is most likely able to do what?
Photosynthesis
5. Create a sequence that most likely represents succession on a recently abandoned corn field:
Grasses – flowering plants – shrub – native trees
6. Complete this statement: the more divers an ecosystem is:
The more stable it is
7. In an area where there was a forest fire, which organism would most like appear first in secondary succession?
Grasses / weeds
8. A vegetable garden is left uncared for, which plant species is likely to come back first?
Weeds
9. In which situation would an ecosystem have the greatest number of limiting factors?
Lava flow creates new land
10. A hurricane hits the Texas coast, what type of succession will occur?
Secondary Succession
11. One farmer grows 20 different crops, one farmer grow only 2 different crops, which one is an example of
biodiversity?
20 different = more biodiversity
12. When a seed grows the roots grow down and the stem grows up, why?
Downward = positive response to gravity
Upward = negative response to gravity
13. A plant responds to a stimulus by moving either away or towards it, what is that phenomenon called?
Tropisms
14. In a plant water can go from one cell to another, this is due to what?
Turgor Pressure
15. Ms. Baxter is performing a test, she puts a glass of water and seeds in a dark box and lets the seed grow for a
few days, after that she opens up a small window and lets the plant continue growing in the small amount of
light that enters.
a. What is the purpose of Ms. Baxter’s experiment be?
To investigate how the addition of light affects seeds grown in the dark
b. What is the purpose of the window?
To regulate the independent variable
c. How would Ms. Baxter increase the reliability of her results?
Repeat the investigation
16. A leaf cells open and close in response to the amount of water available, this is an example of what?
Homeostasis
17. What process causes a plant to wilt in response to too much or too little water?
Transpiration (plant releases water if it has too much/ doesn’t release if it has too little)
18. Running requires additional energy from leg muscles, what condition may result from this activity and what
response helps return the body to a number state of balance?
Increased carbon dioxide in the blood, breathing faster removes this
19. A person gets a bacterial infection and gets a fever. The fever is a response from the body to help fight the
infection by:
Slowing the growth of the bacterial infection
20. A football player maintains his temperature balance by sweating during the game, what is this an example of?
Homeostasis
21. How does shivering help maintain temperature levels?
Muscles contracting generate heat
22. How does sweating help maintain temperature levels?
Evaporation of sweat on skin lowers body temp
23. What two systems are involved in maintaining body temperature with shivering?
Muscular system, nervous system
UNIT 6 AND UNIT 10
STUDY GUIDE
1. Ecological succession and equilibrium share a relationship in the environment, what is it?
2. What is the main contributing factor to an ecosystem’s sustainability?
3.
What is the role of a pioneer species in primary succession?
4. A species that is responsible for primary success in an ecosystem is most likely able to do what?
5. Create a sequence that most likely represents succession on a recently abandoned corn field:
6. Complete this statement: the more divers an ecosystem is:
7. In an area where there was a forest fire, which organism would most like appear first in secondary
succession?
8. A vegetable garden is left uncared for, which plant species is likely to come back first?
9. In which situation would an ecosystem have the greatest number of limiting factors?
10. A hurricane hits the Texas coast, what type of succession will occur?
11. One farmer grows 20 different crops, one farmer grow only 2 different crops, which one is an example of
biodiversity?
12. When a seed grows the roots grow down and the stem grows up, why?
13. A plant responds to a stimulus by moving either away or towards it, what is that phenomenon called?
14. In a plant water can go from one cell to another, this is due to what?
15. Ms. Baxter is performing a test, she puts a glass of water and seeds in a dark box and lets the seed grow for
a few days, after that she opens up a small window and lets the plant continue growing in the small amount
of light that enters.
a. What is the purpose of Ms. Baxter’s experiment be?
b. What is the purpose of the window?
c. How would Ms. Baxter increase the reliability of her results?
16. A leaf cells open and close in response to the amount of water available, this is an example of what?
17. What process causes a plant to wilt in response to too much or too little water?
18. Running requires additional energy from leg muscles, what condition may result from this activity and what
response helps return the body to a number state of balance?
19. A person gets a bacterial infection and gets a fever. The fever is a response from the body to help fight the
infection by:
20. A football player maintains his temperature balance by sweating during the game, what is this an example
of?
21. How does shivering help maintain temperature levels?
22. How does sweating help maintain temperature levels?
23. What two systems are involved in maintaining body temperature with shivering?