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What are hormones? a. they are minerals needed for proper bone formation. b. they are the parts of the body targeted by endocrine glands. c. they are substances needed for muscle and nerve activity. d. they are substances released by endocrine glands.

Ineed an essay 1200words about obezity ,introduction,main causes,conclusion

Which of the following is a nonspecific defense against pathogens? - b cells - antibodies - t-cells - inflammation