Are alveoli of the lungs an organ or are they tissues?

Greenthe fossil record is the history of life recorded byhuman observationgod.climatologists.remains of the past.

Environmental science are unconsidered with methods to preserve natural resourcesa.trueb.false

Which is a function of vascular tissue? a. to perform photosynthesis b. to transport water and nutrients c. to absorb minerals and sugar d. to interact with soil fungi