Biology Worksheet for Finals
Part 1: True or False
1. Pollution only has short-term effects on ecosystems. (True/False)
2. Energy in an ecosystem flows from consumers to producers. (True/False)
3. The recycling of nutrients is called eutrophication. (True/False)
4. Deforestation helps to prevent soil erosion. (True/False)
5. Bacteria have no use in biotechnology. (True/False)
6. The application of living organisms in industry is called genetic engineering. (True/False)
7. The build-up of nitrates in aquatic ecosystems does not affect aquatic life. (True/False)
8. Habitat destruction can be caused by introducing foreign species. (True/False)
9. Pollution can have both short-term and long-term effects on ecosystems. (True/False)
10. Genetic modification involves altering an organism's genetic makeup. (True/False)
11. Restriction enzymes are used to join DNA in genetic modification. (True/False)
12. Abiotic factors, like rainfall, cannot affect plant populations. (True/False)
13. Conservation aims to reduce biodiversity. (True/False)
14. Carbon dioxide gas can build up in the atmosphere due to deforestation. (True/False)
15. Changing the genetic material of an organism is called selective breeding. (True/False)
16. Vectors are used to remove genes in genetic modification. (True/False)
17. Energy in an ecosystem flows from producers to consumers. (True/False)
18. Microorganisms are not used to produce useful products for humans. (True/False)
19. Food webs are made up of interconnected food chains. (True/False)
20. Aerobic respiration by bacteria decreases dissolved oxygen in water. (True/False)
21. An increase in predator population leads to a decrease in prey population. (True/False)
22. Conservation aims to protect ecosystems and biodiversity. (True/False)
23. Genetically modified crops cannot be resistant to pests. (True/False)
24. Mycoprotein is not a product of biotechnology. (True/False)
25. Fertilizers can lead to eutrophication in aquatic ecosystems. (True/False)
26. Plasmids are used as vectors in genetic modification. (True/False)
27. Decomposers do not play a role in nutrient recycling. (True/False)
28. Habitat destruction does not result in the extinction of species. (True/False)
29. Food webs show a complex network of energy transfer. (True/False)
30. Sunlight is the primary source of energy for most ecosystems. (True/False)
Part 2: Fill in the Blanks
1. ________ gas contributes most to the greenhouse effect.
2. ________ is an example of conservation.
3. The recycling of nutrients is called _____________ .
4. ________ is the term for growing a single crop species in the same area for many years.
5. ________ is the purpose of using lipase in biological washing powders.
6. ________ is the role of a fermenter.
7. The application of living organisms in industry is called _____________ .
8. The loss of variety of life in an ecosystem is called loss of _____________ .
9. _____________ are organisms that break down dead organic matter.
10. The build-up of nitrates in aquatic ecosystems can lead to _____________ .
11. The removal of trees from a forest is known as _____________ .
12. The use of organisms to clean up pollution is called _____________
13. _____________ is the process which removes carbon dioxide from the atmosphere.
14. ________ is a product made by yeast.
15. _____________ are used to cut DNA in genetic modification.
16. _____________ factors, like rainfall, can affect plant populations.
17. _____________ can be used to make biofuel.
18. _____________ is a gas that can build up in the atmosphere due to deforestation.
19. _____________ is changing the genetic material of an organism.
20. _____________ are used to deliver genes in genetic modification.
21. The process by which plants convert light energy into chemical energy is called
_____________ .
22. A _____________ is a series of steps in which organisms transfer energy by eating and
being eaten.
23. The introduction of a foreign species into an ecosystem can _____________ food webs.
24. The highest trophic level in an ecosystem is occupied by _____________ .
25. The application of genetic engineering to produce human insulin is an example of
_____________ .
26. ________ is the primary source of energy for most ecosystems.
27. ________ human activities contributes to habitat destruction.
28. ________ is a biotic factor that can limit the growth of a plant population.
29. ________ is a potential negative impact of pesticides on ecosystems.
30. _____________ is an example of habitat destruction.
31. The process of lactic acid fermentation by bacteria is used in making __________.
32. The process of Alcoholic fermentation by yeast is used in making __________.
33. Eutrophication is caused by excessive growth of _______________.
34. The amount of _____________ and _____________ increases in eutrophication.
Part 3: Multiple Choice Questions
1. ________________ is a biotic factor that can reduce a plant population?
A) Rainfall. B) Temperature
C) Fungal diseases. D) Light intensity
2. Which of these can be a consequence of eutrophication?
A) Increased dissolved oxygen
B) Death of aquatic organisms
C) Decreased producer growth
D) Reduced nitrate levels
3. What is the function of plasmids in the process of genetic modification?
A) To produce human proteins
B) To cut DNA
C) To insert genes into bacteria
D) To resist herbicides
4. Which of the following activities does not increase to pollution?
A) Untreated sewage
B) Fertilizers
C) Recycling
D) Deforestation
5. In which way, can humans affect ecosystems and habitats?
A) By altering food webs. B) Reforestation C) Reducing pollution
D) Conservation
6. Which of the following is a concern about genetically modified crops?
A) Increased nutritional qualities
B) Resistance to pests
C) Spread of genes to wild plants
D) Resistance to herbicides
7. What is the use of microorganisms in environmental biotechnology?
A) To produce antibiotics
B) To modify genes directly
C) To create new species
D) To clean up oil spills
8. What is a renewable resource?
A) Coal
B) Oil
C) Wind
D) Natural gas
9. Which of the following is the primary source of energy for most ecosystems?
A) Nutrient cycles.
B) Food webs
C) Sunlight D) Decomposers
10. Which of the following human activities contributes to habitat destruction?
A) Conservation efforts.
B) Agriculture C) Deforestation
D) Recycling
11. What is the purpose of genetic modification in crop plants to improve their
nutritional qualities?
A) To make them resistant to insect pests
C) To add vitamins or minerals
B) To increase their yield
D) To make them tolerant to herbicides
12. What is a potential negative impact of pesticides on ecosystems?
A) Increased biodiversity.
B) Disruption of food chains
C) Enhanced nutrient cycling D) Improved soil fertility
13. Which of the following gases contributes most to the greenhouse effect?
A) Oxygen
B) Nitrogen
C) Carbon dioxide D) Hydrogen
14. What is a potential benefit of genetic modification in medicine?
A) Increasing the risk of allergies
C) Decreasing crop yield
B) Producing human proteins
D) Reducing biodiversity
15. Which of the following is an example of conservation?
A) Deforestation
B) Overfishing
C) Habitat preservation
D) Industrial pollution
16. What is the role of Pectinase enzymes?
A) Product of a microorganism
B) Vector for gene transfer
C) Extracts fruit juices.
D) Trait in GM crops
17. Which of the following is related to Herbicide resistance?
A) Product of microorganism
B) Vector for gene transfer
C) Extracts fruit juices
D) Trait in GM crops
18. Which of the following can be caused by sewage?
A) Eutrophication
B) Habitat destruction
C) Protecting ecosystems
D) Application of living organisms
19. Which of the following is the application of living organisms?
A) Eutrophication.
B) Habitat destruction C) Protecting ecosystems D) Biotechnology
20. Which of the following is a product made by yeast?
A) Protease. B) Ethanol
C) Pectinase D) Lactase
21. What is the term for growing a single crop species in the same area for many years?
A) Polyculture.
B) Monoculture
C) Crop rotation
D) Intercropping
23. ____________ is the function of lipase in biological washing powders.
A) To remove protein stains
B) To extract fruit juices
C) To remove fat stains
D) To produce lactose-free milk
24. A major concern about genetically modified crops is _____________?
A) Increased nutritional qualities
B) Resistance to pests
C) Spread of genes to wild plants
D) Resistance to herbicides
25. The role of a fermenter is ____________.
A) To extract fruit juices
B) To grow bacteria on large scale
C) To make biofuel
D) To produce lactose-free milk
Part 4: Questions/Answers
1. Why bacteria are extensively used in biotechnology?
2. Define recombinant bacteria.
3. Diagram of bacteria.
4. Compare the cell structure of bacteria and animal cell.
5. Write the names of three phases of growth.
6. What happens in lag phase, Log phase, stationary phase and death phase.
7. Define Zooplankton and Phytoplankton.
8. Write down three factors that can negatively affect food webs.
9. Define Food chain.
10. Define Food web.
11. Define aerobic respiration.
12. Define anaerobic respiration.
13. Differentiate biotic and abiotic factors.
14. Differentiate population and community.
15. Define ecosystem.
16. Define deforestation.
17. Define Habitat loss.
18. Define eutrophication.
19. Define producer and give example.
20. What is the difference between primary and secondary consumers?
21. Define tertiary consumer and give example.
22. Define trophic level.
23. Write down trophic levels of Producers, primary consumers, secondary consumers.
24. What is trophic level for tertiary consumer?
25. Define decomposers and give example.
26. Define biosphere.
27. How much energy transfer from one trophic level to next?
28. How much sunlight energy is absorbed by plant when it falls on the leaves?
29. Define biotechnology.
30. Label the following diagrams.
7.
1.
6.
2.
5.
3.
4.
a) Bacteria
3.
2.
1.
b) Growth Phases
2.
3.
1.
4.
6.
5.
c) Food Chain