Why do legume plants enrich soil?

a) They remove selenium a deadly poision

b) They encourage breeding of earthworms

c) Their roots contain nitrogen-fixing bacteria

d) Their root system penetrate 2 meter below the surface

Which of these is the most likely result of the polar ice caps melting? A. The ocean would be more difficult to cross. B. The concentration of salt in the ocean would increase. C. The ocean currents would stop flowing. D.

Which of the following is true for a cell that has a flagellum? It cannot be a part of a multicellular organism. It cannot be a part of the oldest known fossil. It cannot have a cell membrane. It cannot have ribosomes.

Which kind of graph line shows logistic growth

Whats the relationship between an owl and mice could be described as?

Which scenario describes a way that a biotic factor can impact a freshwater ecosystem? A) A decrease in the bottom temperature of a lake can affect fish activity B) A decrease in the salinity of an estuary can affect which fish can survive C) An

How do lucfierace enzyme speed up the chemical reaction?

It is possible for an organism to do everything well. True False

Which of the following material has the highest electrical conductivity? Wood Clay brick Iron Aluminum Copper Nickel

Which of the following can cause excess growth of algae in water? 1) large amounts of fecal coliform 2) high nitrate content 3) high phosphate content 4) All of the above

If you have damage to the left cerebral hemisphere is most likely to reduce people's ability to