The extinction of the giant insects

 

To get full credit for this Discussion Board, students must:

  • Submit an initial post addressing questions 1, 2, and 3 below
  • Respond to at least one classmate’s posting by challenging his/her answer to question 2 below 
  • Use standard English grammar and spelling

Topic

The studies of fossil records indicate that current insects evolved from giant ancestors. Watch the video titled “The Age of Giant Insects” to learn more about insect evolution. Some scientists argue that the era of giant insects ended as the levels of atmospheric molecular oxygen declined; others stated that as birds conquered the skies, they outcompeted larger insect species. To learn more about this passage in evolutionary history, read the article titled “Reign of the giant insects ended with the evolution of birds” available at the Indiana Public Media website. 

The video titled “The Age of Giant Insects” is available in Chapter 10, third page, under Discussion Questions.

The article titled “Reign of the giant insects ended with the evolution of birds” is available in Chapter 10, third page, under Discussion Questions.

Questions

1.  Postulate a hypothesis to explain the disappearance of giant insects during evolution?

2.  Explain the evidence that supports the stated hypothesis.

3.  Proposed at least one experiment to test the stated hypothesis.

Students’ participation will be graded as follows:

Did Not post or Posted Late                               (0%)

____________________________________________________________

An initial post that clearly shows that the student has researched to answer all three questions.

1. Relevant information supports the answers   (65%)

and

2. Includes references                                        (70%)

or 

An initial post that clearly shows that the student has researched to answer only two questions.

1. Relevant information supports the answers  (50%)

and

2. Includes references                                       (55%) 

or 

An initial post that clearly shows that the student has researched to answer only one question.

1. Relevant information supports the answer    (40%)  

and

2. Includes references                                        (45%)

or

The student provides a thoughtful and substantial challenge to a classmate’s answer to question 2.                                          (30%)

__________________________________________________________________________

An initial post that clearly shows that the student has researched to answer all three questions.

1. Relevant information supports the answers

2. Includes references 

and

3. The student provides a thoughtful and substantial challenge to a classmate’s answer to question 2

                                                                           (100%)

Due Date 03/28/2021