An acid is best defined as: Select one: a. a substance with a pH between 0 and 7.
b. a substance with a pH between 7 an 14.
c. a substance that is exactly pH 7.
d. A substance with a pH between 0 and 14. m

Which sentence best expresses the differing opinions of these two book reviews?

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

Which experiment would most likely contain experimental bias