Question

describing populations
for questions 1 - 5 complete each statement by writing the correct word or words.

1. the population density is the area in which a population lives. of individuals per unit area.
2. population density is the of individuals are spaced in their range is a populations
3. how the individuals are spaced in their range is a populations in size.
4. growth rate is how quickly a population of a population, count the number of males and females.
5. to find the of each age.

population growth
for questions 6 - 10, write true if the statement is true. if the statement is false, change the underlined word or words to make the statement true.

1. if the death rate is less than the birthrate, the population is likely to shrink.
2. immigration increases population size.
3. young animals may immigrate from the place where they were born to establish new territories.
4. a high birthrate and immigration decrease population size.
5. populations grow if more individuals are born than die in a period of time.

Explanation:

1. Population density is calculated as the number of individuals per unit area.
2. Spacing of individuals in a range relates to dispersion pattern, not directly to population size increase in this context.
3. Growth rate is determined by birth - death rates and migration, and is about population size change over time. Counting males and females is part of population census but not the definition of growth rate.
4. To find age - structure of a population, we consider the number of individuals in each age - group.
5. Population growth occurs when more individuals are added (births and immigration) than lost (deaths and emigration). High birthrate and immigration increase population size, not decrease it. Young animals may immigrate to new territories. Immigration increases population size. If death rate > birth rate, population is likely to shrink.

Answer:

1. number
2. dispersion
3. changes
4. structure
5. increase
6. True
7. True
8. True
9. False
10. True