If a pathogen returns to the body, these kind of B and T cells can multiply and fight off the pathogen. (one word, must be spelled correctly)

Which of the following is not a characteristic of natural selection? 100 points pls more offspring are born than will survive to reproduce. mutations appear randomly breeding pairs are chosen by humans organisms that are better adapted are more likely to survive

Which of the following is not a characteristic of carnosaurs? a. long narrow skulls b. strong forelimbs c. horn projecting from their skulls d. none of the above

Which describes the habitat of a frog?