5 Which is NOT a property of the organisms that have become useful index fossils? * (20 Points) A. The organisms existed for a relatively short period of time. B. The organisms existed over a large area. C. The organisms were abundant when they existed. D. The organisms still exist today.

Stages 1 and 4 of the demographic transition are similar in that

Where is the vascular system located

Which of the following statements best characterizes changes to agriculture in the united states since 1900? a. increased mechanization has reduced the need for labor.b. increased mechanization has increased the need for water, thereby increasing the need for labor.increased mechanization has increased the use of land, thereby increasing the need for labor.d. increased mechanization has increased food production, thereby increasing the need for labor. select the best answer from the choices provided.