Which type of digestive system can perform both chemical and mechanical digestion?

20 in the formula no3, what does the subscript 3 mean?

Anonnative species is best described as a species that a. does not normally live in an area b. has no permanent home c. is a poor predator d. increase biodiversity

Select all that apply. careful listening skills include: refraining from interrupting the speaker taking quality notes making an effort to understand maintaining eye contact with the speaker