AP BIOLOGY

ANIMAL BEHAVIOR

SOCIAL BEHAVIOR

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
There are 200 bears in an area. 10 emigrate, 15 immigrate, 10 are born and 20 die. How many are left?
A
195
B
205
C
200
D
260
Explanation: 

Detailed explanation-1: -Net reproductive rate (r) is calculated as: r = (births-deaths)/population size or to get in percentage terms, just multiply by 100. the population is so much bigger, many more individuals are added. If a population grows by a constant percentage per year, this eventually adds up to what we call exponential growth.

Detailed explanation-2: -The population growth rate (sometimes called the rate of increase or per capita growth rate, r) equals the birth rate (b) minus the death rate (d) divided by the initial population size (N0).

Detailed explanation-3: -The 4 main types of growth patterns include: J-pattern growth: This is an exponential growth pattern seen mostly in microbes and rarely in other organisms. The exponential growth of population produces a ”J” shaped curve on the size vs. generations graph.

Detailed explanation-4: -An example of a population would be the entire student body at a school. It would contain all the students who study in that school at the time of data collection. Depending on the problem statement, data from each of these students is collected.

There is 1 question to complete.