What is an advantage of recycling metals? a) metal articles would become more expensive. b) metals become lighter after they are recycled. c) metals become stronger after they are recycled. d) lesser amounts of fresh metal would be required.

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.

How does the study of genetic disorders such as pku biologists understand normal alleles?

The idea of spontaneous generation was disproved by in a experiment involving jars of meat