Factors That Regulate Population

Name:___________________________________ Score: __________________

Course and Year: __________________________ Date: ___________________

I. IDENTIFICATION: Write the word/term that is being described on the space provided.

______________________1. These factors arise because the population of the species have to compete for the same resources in a limited geographical niche.

______________________2. It is the population’s ability to increase at its maximum rate under optimal conditions.

______________________3. Species whose populations increase rapidly, often exponentially are referred to as ____________.

______________________4. Variables which includes weather and natural disasters.

______________________5. It is represented by the letter K when used in mathematical equations.

II. MULTIPLE CHOICE: Encircle the letter of the correct answer.

1. All of the following choices are characteristics of K-selected species except _____.a. Late maturation c. Shorter life spanb. More parental care d. Intense competition for resources

2. It is a density-dependent factor that regulates the population by means of predator-prey relationship.a. Competition c. Territorialityb. Predation d. Prevalence of disease

3. Factor that occur regardless of a population size in a species.a. Density-independent factors c. Biotic factorb. Regulating factor d. Density-dependent factor

4. What would likely to happen when there is an increase in population size of the prey and lesser number of predators?a. Higher occurrence of both species coming across one another.b. An increase in the predator’s population.c. More chance of the prey species members (prey) of being killedd. Both A and C

5. Disease spreads quickly through dense populations because ______________.a. Individuals live in closer proximity to each other.b. Individuals are competing for the same resources in a geographical niche.c. Individuals live in farther proximity to each other.d. Individuals are immuned.

6. When population became crowded and the food becomes limited to the species population, this density-dependent factor most probably to occur.a. Territoriality c. Spread of communicable diseaseb. Competition d. None of the choices

7. Species whose populations increase until they reach the carrying capacity of their environment.a. g-selected species c. r-selected speciesb. C-selected species d. K-selected species

8. Population can increase their size indefinitely because the simply aren’t enough resources for everyone. This statement is______.a. True c. Falseb. Neither true nor false d. Cannot determined

9. Density dependent factor: Biotic variables as Density-independent factor: __________.a. Abiotic variables c. Controlled variablesb. Dependent variables d. Independent variables

10. All of the following are examples of density-independent factors except ____________a. Forest fire c. Severe storm and floodingb. Territoriality d. Modification of weather conditions.

III. ESSAY (5 points) Discuss briefly. Write your answer at the back of this paper.When natality is greater than mortality, what is likely to happen? Explain.