In order for natural selection to occur which conditions are necessary? a. no mutations b. each organism born must survive c. no variation d. more born than can survive

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

The picture shows a location in india that is very dry and arid. notice the tall mountains in the background; you can find high amounts of vegetation on the other side of the mountains. which statement is most likely true for this area?

Which process in respiration happens first? a)pyruvate processing b)electron transport chain c)krebs cycle d)glycolysis