Common lab equipment is used to test for ph and these meters are calibrated two or three times per day to ensure accurate readings. a) turbidity b) conductivity c) total ammonia d) bacteria count

they both go up but then go back down. they both end lower than they started. lastly, they both are competitive/the second on.

explanation:

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.