Assignment 9 First Life Part 2 Answer

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Assignment 9 First Life Part 2

GSC 112                                

Extra Credit Exercise #2

Watch the second episode of David Attenborough’s 2013 documentary series, “First Life”, part 2.

The video is at: https://www.youtube.com/watch?v=xevizYKF8n8

  1. Which group produced the first big predators, and the first group to crawl out of the water and invade the land and air?

 

  1. How many specimens have been collected from the Burgess Shale?

 

  1. How did scientists first misinterpret Hallucigenia?

 

  1. How did scientists first misinterpret Anomalocaris?

 

  1. How fast can mantis shrimp strike?

 

  1. What group makes up 50% of the fossils in the Burgess Shale? What is the most abundant fossil at Mt. Stephen?

 

  1. What two anatomical features gave the trilobites of Morocco an advantage?

 

  1. How many lenses did some trilobites have in each eye?

 

  1. What is the length of the biggest trilobite known? Why did they grow so big?

 

  1. What was the biggest arthropod that ever existed? What was their maximum size?

 

  1. What were the advantages of living on land? What were the disadvantages?

 

  1. What “living fossil” were the first land arthropods like? What groups are they halfway between?

 

  1. Why can’t velvet worms get much bigger or live in dry climates?

 

  1. What is the age of the first known land animal? What living animal are they related to?

 

  1. How tall were the horsetail trees of Crail, Scotland?

 

  1. What was the largest arthropod known? How long was it? Why did they grow so big in the Carboniferous Period?

 

  1. What was the earliest group of insects? What were the first animals to fly?

 

  1. Why are there no giant arthropods today? How do modern insects compensate for the inability to grow large individual body size?

 

  1. Why is the Burgess Shale Pikaia so important to us?

 

  1. Why can’t the rhinoceros beetle grow as large as a rhinoceros?

 

 

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Assignment 9 First Life Part 2 Answer

 

  1. Which group produced the first big predators, and the first group to crawl out of the water and invade the land and air?

Answer: Arthropods

  1. How many specimens have been collected from the Burgess Shale?

Answer: Over 65,000

  1. How did scientists first misinterpret Hallucigenia?

Answer: The scientists were looking the other way around. They interpreted the real bottom as the upper portion of the animal and vice-versa.

This question is taken from GSC 3200 – Studies of a Blue Planet » Fall 2021 » Assignments