8. you direct a cow through an alleyway that decreases in size and then through a gate. at the front of the device is a which is used to restrain the cow's head. a. stanchion b. chute c. head collar d. halter

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.

c should be the answer