Answer: Unicellular and microscopic features set the protista apart from the rest of the kingdom.
Explanation:
Protista are eukaryotic organisms that are neither plants, animals or fungi. They do not have a natural group with whom they share common ancestor. They have a unique features that set them apart from the rest of the kingdom which are unicellular and microscopic. Examples are amoeba, blue green algae, diatoms, green algae, ciliates and many more.
Alveoli are found in lungs and exchamge O2 and Co2 !!
so answer is last one !!
Cuando el hielo se calienta, comienza a derretirse y a formar agua, esto es progresivo
Una pieza de roca áspera. I'm only guessing <span />