Which is a logical predator-prey relationship?
a) leech-human
b) lion-gazelle
c) rabbit-lettuce
eliminate
d) dog-mountain lion

How many cells are our body made of ? ♡

9. the history of life on earth is recorded in

During an experiment, readings for blood pressure in a persons body were found to be constant . however , when he measured by a different blood pressure cuff , the readings differed by 15 points for each reading. this difference indicates that the results are