Why is a food web a more accurate representation of the flow of energy through an ecosystem than a food chain?
a. a food web shows multiple pathways of energy flow through the ecosystem.

b. a food web shows a single pathway of energy flow through the ecosystem.

c. a food web has limitations with the organisms involved.

d. a food web does not show all the organisms.

Catalina ate a candy bar and then went on a fast-moving ride in an amusement park. she was sick to her stomach after the ride and now, catalina cannot eat candy bars, because they make her nauseous. in this learned association, the candy bar serves as a(n) to catalina.

According to research, which of the following statements reflecting the relationship between emotion and the prefrontal cortex is false? a.the prefrontal cortex to regulate one's emotional response. b. the prefrontal cortex is activated when processing information associated with stress. c. sensory input indicating emotion first enters the prefrontal cortex before traveling to the amygdala. d. the prefrontal cortex processes information associated with emotional pleasure.

Which behavior of an expectant mother is unhealthy