2. A train travels at a speed of 40 mph and travels a distance of 240 miles. How long did it take the train to complete its journey?

S=
D =
T =

Which group of chordates does  notpossess true backbones?                 a.  birds      b.  frogs and toads      c.  lampreys      d.  crocodilians

In which of the following relationships is one organism always benefited while the other organism is always harmed

Recombinant dna is the merging of dna from unrelated organisms to create new genetic varieties is assembled in the lab from mononucleotides was part of the green revolution of the 1960s is pollination of one plant by another of the same species is cross-pollination of one plant by a different species