I belive that the emperor penguin fits all the criteria of Group B.
Antibiotics are ineffective against viruses because viruses do not have cells. Viruses are infectious agents that live within the cells of other living things. Antibiotics work by breaking down the cell walls of bacteria or interfering with the bacteria's ability to repair its cell's DNA, according to How Stuff Works.
Answer:
a single cell is unicellular and many cells is multicellular
Explanation:
Easily can slip away from predators.