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The protozoan plasmodium falciparum is transmitted by
female Anopheles mosquitoes
female Aedes mosquitoes
female Culex mosquitoes
Female blackfly
The loss of soil through erosion can be reduced by
watering
crop rotation
manuring
irrigation
The vector for yellow fever is
Aedes mosquito
Anopheles mosquito
tsetse fly
blackfly
The average number of individuals of a species per unit area of the habitat is the
population density
population frequency
population size
population distribution
The activity of an organism which affects the survival of another organism in the same habitat constitutes
an edaphic factor
an abiotic factor
a biotic factor
a physiographic factor
