Mouth, pharynx, esophagus, stomach,

What is thought to have caused the mass extinction at the end of the cretaceous period?

Give three examples of plant activities that are affected by circadian rhythms and natural fluctuations in the length of daylight?

Which plate boundary causes plates to collide forming mountain ranges, volcanoes, and island arcs? give an example of this type of plate boundary. 2. at which plate boundary do rifts and mid-oceans ridges form? give an example of this type of plate boundary. 3. at which plate boundary do plates slide past each other while moving in opposite directions? give an example of this type of boundary.