Learn English – “That’s the rubber and ruler” Why isn’t it “they are” as there are two objects

There is no frog with feathers anywhere on earth. Are you quite sure you saw it flying?

There are no frogs in Antarctica.

"No frog" can be more strident than "no frogs". It would depend on the context.

While a native speaker would probably not blink at speech that said, "There's a banana and an apple on the floor," it's not actually correct. "There is" is used primarily for singular nouns: "There is fruit on the floor." "There is cat fur on my coat." "There is someone at the door."

Meanwhile, "There are" is for plurals. "There are cats on my coat. There are oranges on the floor. There are people at the door."

While "fruit" counts as a singular, once you separate it out into "fruit 1 and fruit 2," it becomes plural, and therefore, uses "There are." AverageGatsby's answer basically gives a good rule of thumb on whether you can use "is" or "are."