2nd Quarter – Learning Material in Grade 11
Earth and Life Science
WORKSHEET 7: Population Ecology
Name________________________________ Grade and Section___________________ Score____________________
Teacher______________________________ School___________________________________ Date_______________
Objective: Categorize the different biotic potential and environmental resistance (e.g., diseases, availability of food, and
predators) that affect population explosion.
BIG IDEAS
• Population refers to all members of the same species living in a particular area.
• Biotic potentials are growth factors. The potential for propagation of life, capacity of a population for growth.
• Environmental Resistance = decrease factors, all the factors acting jointly to limit the growth of a population.
• Carrying capacity is maximum number of individuals than a particular environment can support. Carrying capacity
is determined by the interplay of biotic potential and environmental resistance.
Directions: Use the word bank to match the definition with the term.
Ecosystem
Abiotic
Organism
Biotic
Biome
Community
Biosphere
Population
1. Living part of the environment _____________________
2. Collection of abiotic and biotic factors in an environment ______________________
3. A single living thing that can breed/produce fertile offspring _____________________
4. Ecosystem with same climate and similar communities ___________________________
5. Individuals of the same species that live in the same area_________________________
6. Earth with all the ecosystems _______________________
7. Different interacting populations that live together in an area ____________________
8. Nonliving part of the environment _____________________
Directions: Identify whether the following factor is biotic potential or environmental resistance. Write BP if it is biotic
potential and ER if it is environmental resistance.
________ 9. Abundance of predators
________ 10. Resistance to diseases
________ 11. Tight competition to other species
________ 12. High mortality rate
________ 13. Inbreeding
________ 14. Limited distribution
________ 15. Species fearlessness to humans
________ 16. Highly adaptable to changes
________ 17. Climate sensitive
________ 18. Prolific breeders
Prepared by: Mittel Ann R. Balbin, SST1, Mariano Marcos Memorial High School
References: Olivar II, J. T., & Morales-Ramos, A. C. (2016). Exploring Life Through Science Series – Earth and Life Science.
https://schools.mabankisd.net/page/open/15005/0/Ecology-Worksheet.pdf
2nd Quarter – Learning Material in Grade 11
Earth and Life Science
Directions: Use the words inside the box to complete the concept map that summarizes the environmental principles of
resistance and potential. You may use the words in any order.
Predation
Diseases
Food abundance
Habitat loss
Unfavorable climate
High genetic diversity
High reproduction rate
Lack of competitors
Directions: Examine the graph below and answer the questions that follow.
1. Which of the two curves exhibits
exponential growth curve? Which
organism is it for? _________________
________________________________
A
B
2. Which graph is a logistic growth
curve? Which organism does it show?
________________________________
________________________________
3. What is the carrying capacity of the
ecosystem for the logistic growth curve?
________________________________
4. In what year/generation does this
population reach its carrying capacity?
________________________________
Prepared by: Mittel Ann R. Balbin, SST1, Mariano Marcos Memorial High School
References: Olivar II, J. T., & Morales-Ramos, A. C. (2016). Exploring Life Through Science Series – Earth and Life Science.
https://schools.mabankisd.net/page/open/15005/0/Ecology-Worksheet.pdf