Revision: practice test http://www.dynamicscience.com.au/t.asp?4724
Review Question Answers:
Q1. B Q2. C Q3.B Q4.A Q5.C Q6.D
Q7 a. Zero population growth means that there is no change in the total number of magpies in the population. This means that the sum of the births and the number of magpies immigrating to the population must be equal to the sum of the number of magpie deaths and number of magpies emigrating from the population
b. This may not be true. If for example the birth rate was very low the death rate may also be very low to result in zero population growth. Rates of immigration and emigration of the magpie would also need to be taken in to account.
Q1. B Q2. C Q3.B Q4.A Q5.C Q6.D
Q7 a. Zero population growth means that there is no change in the total number of magpies in the population. This means that the sum of the births and the number of magpies immigrating to the population must be equal to the sum of the number of magpie deaths and number of magpies emigrating from the population
b. This may not be true. If for example the birth rate was very low the death rate may also be very low to result in zero population growth. Rates of immigration and emigration of the magpie would also need to be taken in to account.
Density- dependent growth: Density is the population within a given area. Density-dependent growth is determined by factors (Food, water, shelter) that influence the birth and death rates of the population and therefore affect the size of the population.
More important when the population is nearing the carrying capacity of the environment. (the higher the density, the greater influence that intraspecific factors have on growth)
More important when the population is nearing the carrying capacity of the environment. (the higher the density, the greater influence that intraspecific factors have on growth)
M= total number of marked and released, C= total number captured, R= captured number that were marked
Population (N)= (Mx C) / R
Q1. 35 frogs were caught in the pond of a local park.These were marked and released. 1 week later 87 frogs were caught in the pond. 11 of these were marked. What is the population of frogs in this pond?
Q2. The population of rabbits in a field is 90. The experimenter caught 30 rabbits on his second evaluation and 8 of these were marked, but he cannot remember how many he first caught and marked initially. Using the formula, how many rabbits were caught and marked initially?
Population (N)= (Mx C) / R
Q1. 35 frogs were caught in the pond of a local park.These were marked and released. 1 week later 87 frogs were caught in the pond. 11 of these were marked. What is the population of frogs in this pond?
Q2. The population of rabbits in a field is 90. The experimenter caught 30 rabbits on his second evaluation and 8 of these were marked, but he cannot remember how many he first caught and marked initially. Using the formula, how many rabbits were caught and marked initially?