Question

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Graded Assignment
Semester Assessment, Part 2
Complete this teacher-scored portion of the assessment and submit it to your teacher.
Total score: ____ of 15 points
(Score for Question 1: ___ of 5 points)
1. Compare the digestive systems of a flatworm and a human. Be sure to include examples of the various structures found in the digestive systems of both organisms.
Answer:
Type your answer here.
(Score for Question 2: ___ of 5 points)
2. Name the trophic levels in an ecosystem and explain how energy moves through the trophic levels. Use the terms food chain and food web in the discussion.
Answer:
Type your answer here.
(Score for Question 3: ___ of 5 points)
3. Describe two of the following environmental issues that confront modern society: global warming, air pollution, acid rain, and hazardous waste. Explain how the issues are problems for society and how scientific studies can inform people concerned with the issues.
Answer:
Type your answer here.

Answer 1

1. The digestive system of a flatworm is comprised of a single big solitary tube. Food is taken in from one end of the system, digested, and nutrients are absorbed within, while waste is ejected at the other end. Mechanical digestion takes place in the gizzard.

In humans, however, food goes significantly further through the convoluted tubules after ingestion, and food remains in the stomach for a longer period of time. Food is mechanically digested in the mouth, then transferred through the esophagus, stomach, small intestine, and large intestine, and waste leaves through the anus.

2. Producers, primary consumers, secondary consumers, and tertiary consumers.

3. CAPITALISM: Among the most common criticisms of capitalism claim that it is intrinsically exploitative, alienating, unstable, and unsustainable, and that it causes vast economic inequalities, commodifies individuals, is anti-democratic and leads to the degradation of human rights.

HAZARDOUS WASTE: Because it pollutes every component of the environment, including air, water, and land, hazardous waste might be considered a crime by our civilization. This has the potential to cause a major issue. What it does is affect the natural lifestyle of many species that comprise the ecosystem, perhaps resulting in a tragedy for all life on Earth.