Which of the following is used as evidence in supporting the idea that life changes over time?
a. the time period in which an embryo develops
b. the similarities in the body systems such as the nervous and circulatory systems
c. the existence of homologous structure
d. the big bang theory

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. label the following topographic map. click on a label below the map to select it, and then click on the appropriate box on the map to place the label. (increments for contour lines is 50 ft).

Dan made the table shown to describe two different relationships between animals. organism interactions relationship a relationship b one organism lives inside the organism it feeds off no organism is harmed which of the following statements is most likely correct?

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity