Answer:
Gasoline is a complex blend of compounds made from petroleum. There are various grades of gasoline. Thus it is a mixture. A classmate claims that brass and silver are both pure substances because they have a uniform composition throughout.
Explanation:
Aluminum is a chemical element so it is a pure substance. Thus it is a mixture. Gasoline is a complex blend of compounds made from petroleum
Enzymes are very sensitive to temperature and pH.
An enzyme will not function well or at all if it is at the wrong temperature or pH level. However, there is no set range for all enzymes; every enzyme is different and has their own range. For example, the pH levels under which stomach enzymes work best would be vastly different from the pH levels under which intestinal enzymes work.
Hope this helps!!
Answer:
B
Explanation:
It's the same thing that Pavlov did with the dogs, but instead of a can opener, he used a bell. The dogs drooled at the sound of the bell because they knew that the food was coming.
The genotypes for the parents should be RR and rr. I hope this helps!
