The boundary between the Nazca plate and the South American plate involves oceanic crust moving towards
continental crust.
What do you expect to form at this boundary?

An ocean trench and a chain of volcanoes

A rift valley

New oceanic crust

A mid-ocean ridge

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves

here is the answer

water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.