How should I prepare for my national exam? And I don't remember most of the things that I have learned in math and physics class. What should I do.

First never thing that you have forgotten most of the things for that is the problem why most of the student fail there examinations.Second, if you have a bad attitude towards those subjects and always hate the teacher 100%sure you will fail.So i adress you that you much have a positive attitude towards the subject and teacher . Before i forget Pratice pratice make perfect always remember that .My friend when one deal with physics it is something that you show understand the theory of the subject not memorzing

answer: hey improve the marine life in a certain area.

they provide a new location for fishermen to fish and which works to ease the pressure on natural reefs.

they are a great way to get rid of large objects that would otherwise be placed on landfills

explanation:

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.