Which pair demonstrates a mutualistic relationship?
a. orchid and its host
b. rhizobia and strawberry plants
c. soil fungus and soil bacteria
d. mistletoe and its host
e. mychorrhizae and roots
e
You might also like to view...
In arid terrestrial environments, salt can accumulate in the soil because of
A. the selective uptake of water by plants. B. the activities of grazing animals. C. the precipitation of salt from dry air. D. the secretion of salt by plants. E. the settlement and evaporation of water.
Humans (which have a chromosome number of 2n=46) have 92 chromosomes during G2
a. True b. False
Once labor begins in childbirth, contractions increase in intensity and frequency, causing more contractions to occur until delivery. The increasing labor contractions of childbirth are an example of which type of regulation?
A) positive feedback B) negative feedback C) feedback inhibition D) enzymatic catalysis
The technique of vaccination as developed by Jenner was an improvement over variolation because
A) cowpox was common in Europe at the time while smallpox was not. B) cowpox vaccination was not just preventative but could also cure an active case of smallpox. C) the smallpox virus mutates frequently but the cowpox virus does not. D) the cowpox virus used by Jenner was not fatal to humans but provided protection against smallpox. E) Jenner's technique required a lower rate of herd immunity to prevent the spread of smallpox.