b . secondary
c . tertiary
5 . If a farmer sprays a pesticide onto a field and kills half of the insect pests , he has caused a reduction in ________.
a . field capacity
b . carrying capacity
c . population size
d . More than one of the above
6 . What type of survivorship curve would you expect for a plant species in which only a few seeds are produced and most of these survive to produce adult plants ?
a . type I
b . type II
c . type III
7 . An ecological niche is an organism ' s _______ in an ecosystem .
a . location
b . habitat