What is a tumor that remains localized in a specific area called? Benign
Carcinogen
Metstatic
Malignant

In natural selection, what is actually “selected? ” a) alleles are directly selected b) genotypes are directly selected c) phenotypes are directly selected d) entire populations are directly selected

Which of these substances does not protect against invaders in the nonspecific immune response? a. saliva b. mucus c. tears d. urine

The structure that houses the cells genetic information.