Which one of the following bones articulates with the metatarsal bones? O fibula
O patella
O femur
O tibia
O phalanges

Forces that are equal in strength but opposite in direction are a.) balanced b.) unbalanced c.) always result in motion d.) do not exist

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

Give examples of selective advantage of organism’s body part/organ