Barrons AP Environmental Science

consumers   can take    to  reduce  its environmental   impact

2. An AP Environmental Science class did an investigation on competition.
   Part I of the investigation focused on intraspecific competition to assess the
   effect of growth among radish plants at different population densities. Part
   II of the investigation focused on the relative competitiveness of two
   species of plants (radish and wheat) when they were planted together. The
   results are presented below: Part I: Intraspecific Competition Among
   Radish Plants

Seeds   per Pot Total   Biomass per Pot (g)

1 5.0

10 70.0

20 75.0

Part    II: Interspecific   Competition Between Radish  and Wheat   Plants

Seeds   per Pot Total   Biomass per Pot (g)

1   radish 5.0

1   wheat 3.0

10  radish 50.0

10  wheat 25.0

20  radish 75.0

20  wheat 40.0

(a) Discuss the results of Part I of the investigation.

(i) At  what    population  density was the biomass per plant   highest?

(ii)    Identify    and describe    two resources   that    may have    been    limited.

(iii)   Discuss the results obtained    from    the class   for Part    I   in  terms   of  two

biological  laws    or  principles.

(b) Discuss the results of Part II of the investigation.