Some birds follow moving swarms of army ants in the tropics. As the ants march along the forest floor hunting insects and small vertebrates birds follow and pick off any vertebrates that fly or jump out of the way of the ants. This situation is an example of what kind of species interaction between the birds and the ants? a. resource partitioning
b. competitive
c. exclusion
d. mutualism
e. parasitism

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.