Which of the following are consequences of humans polluting streams? - Nitrates from fertilizers deplete oxygen and leave "dead zones" where no fish or typical sea life can survive.
- Pesticides can kill non-target organisms, including beneficial insects, soil bacteria and fish.
- Trash that blows into streams can be damaging and endangering to wildlife.
- Animals, such as cows, stand in the flowing water and their waste mixes with the fresh water.
-Pollutants can cause algae to grow quickly, which produce toxins that harm other life in the streams.

In tossing one coin 10 times, what are your chances for tossing a head? a tail? 2. in tossing one coin 100 times, what are your chances for tossing a head? a tail? 3. in tossing one coin 200 times, what are your chances for tossing a head? a tail? deviation = ((absolute value of the difference between expected heads and observed heads) + (absolute value of the difference between expected tails and observed tails)) divided by total number of tosses. this value should always be positive. 4. what is the deviation for 10 tosses? 5. what is the deviation for the 100 tosses? 6. what is the deviation for 200 tosses? 7. how does increasing the total number of coin tosses from 10 to 100 affect the deviation? 8. how does increasing the total number of tosses from 100 to 200 affect the deviation? 9. what two important probability principles were established in this exercise? 10. the percent of occurrence is the obtained results divided by the total tosses and multiplied by 100%. toss the coins 100 times and record your results. calculate the percent occurrence for each combination. percent head-head occurrence: percent tail-tail occurrence: percent head-tail occurrence:

Why do bacteria thrive even in hostile environments

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above