Which of the following is not one of the earth’s major terrestrial biomes?.

The object would have to be spherical, orbit the sun, and be traveling in a path with other objects.

The answer is a or b

Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.