The organisms in a community are interdependent. what does this mean? the organisms are very different from one another. the organisms compete for food and water. the organisms rely on each other for survival. the organisms all live in the same niche.

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction. this is an example of speciation.

What was the land like over 500 million years ago? what was under the sea?

What is used to keep track of the gamates and possible offsprings combination