Bare rock Colonised by
pioneer species
(e. g. moss)
Decomposition
creates a layer
of topsoil
Grasses grow
and displace the
pioneer species
More nutrients
in soil allows for
shrub growth
Increase in soil
depth allows for
growth of trees
What ecological process is shown above?
O migration
O primary succession
O secondary succession
O nitrification

Researchers randomly divide participants into groups. each group takes a different amount of omega-3 fatty acid supplements daily for a month. one group receives a placebo. the researchers measure the impact on cholesterol levels in the blood. what is the purpose of random assignment in this experiment? a, to produce treatment groups with similar characteristics b, to ensure that all people with high cholesterol have an equal chance of being selected for the study c, to increase the accuracy of the research results and prevent skewness in the data

Awolf pack hunts,kills, and feeds on a moose. in this interactions, the moose is a?

What is gene flow? apexa: selection for average traits b: when a population splits in twoc: a mutation becoming more commond: genes moving between two populations