Reading  Guide  5-1                                        ...................................Name ___________________________________

1.  How long can kelp stalks grow? ___________
2.  What do sea otters eat? _____________________________
3.  What are the three important characteristics of a population?
       ___________________________________________________________________________________________
4.  Population _____________________________ is the number of individuals per unit area.
5.  Three factors that affect population size are the number of
    _______________________,      ______________________   , and the number that enter and leave.
6.  What happens when a population’s birthrate is greater than its death rate? _______________________________


7.  What is immigration? ________________________________________________________________
                   emigration? __________________________________________________________________
8.  What does the J-shaped curve indicate about a population? ____________________________________________
9.  A population will grow exponentially when it has ideal conditions and __________________    ___________________
10.  Fig 5-3.  How long did it take for the bacteria to enter exponential growth?  ________________________
                                                                                                                the elephants? ______________________
11.  What happens to a population when the resources become less available? _________________________________
12.  The S-shaped population curve indicates what type of growth? ____________________________
13.  Define carrying capacity: ___________________________________________________________________________________________

14.  Examine the graph.

a.   During what time period did the cockroaches grow exponentially?graph cockroach
circle Day  1-10     circleDay 1-90
 circle Day 1-50     circle Day 50-90   

b.  What is the carrying capacity? _________________

c.  How many cockroaches were present on day 30?   
                                                                              _________