Biologist group living things based on . Habitat Habitat Size Size Colors Colors Shared Characteristics

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

Which of the following ocean acidification? are the most likely side effects of a ph less than 7.0 in the ocean b. more metal salts altering the ocean chemistry c. dissolution of the shells of marine organisms d. both a & b e. all of the above.