Watch History channel’s episode of Evolve\" onThe Eye“. It comes as a single app
ID: 1884587 • Letter: W
Question
Watch History channel’s episode of Evolve" onThe Eye“. It comes as a single approximately 45 min video:
Evolve: The Eye https://www.youtube.com/watch?v=iuuan74brFM.
Watch this, then answer the following questions:
1. Kent Stevens undertook some interesting research with respect to dinosaur vision:
(a)What is meant by the degree of binocular overlap? And what purpose would it serve to
a Tyrannosaurus Rex?
(b)How did Dr. Stevens determine this overlap? And what is this overlap for the
Tyrannosaurus?
(c) What is the degree of binocular overlap for the Allosaurus and what does this suggest
about its’ style of hunting? What is the supporting evidence for this style of hunting?
2. What features of mammal eyeball anatomies does Chris Kirk suggest are adaptations to
provide night vision?
3. Primates have 60 degrees of binocular overlap.
(a)What reasons are given for that large an overlap for primates?
(b) What evolutionary pressures on primates are suggested by Nate Dominy and Scott
McGraw as a result of this overlap? How did primates adapt to these pressures?
Explanation / Answer
1(a.) Binocular overlap is the angular region which both eyes can see, in other words, it describes how much of the viewed scene can be seen by both eyes as opposed to by just one of the eyes. The binocular overlap provided a better sense of distance and clarity to the Tyrannosaurus which enhanced their hunting skills.
(b.) To determine the binocular overlap of Tyrannosaurus, Dr. Stevens draw two lines each showing the field of vision of an eye. The region, intersected by these two lines, was the binocular overlap of Tyrannosaurus. It was found to be 55 degrees for aTyrannosaurus.
(c.)Allosaurus had a binocular overlap of 20 degrees. It means they didn't have as accurate distance perception as a Tyrannosaurus had. So rather than attacking the prey on their first sight, they used to wait for the prey to come nearer.
2.) According to Chris Kirk in order to have night vision mammals developed large corneas so that more light can enter in their eyes and they could see even in the night.
3 (a.) Primates used to jump from one tree to another for that they needed a better sense of height and distance which was provided by a larger binocular overlap.
(b.) By having a large binocular overlap, the primates made a compromise with their peripheral vision and their predators, like eagles, used to take advantage of their lack of peripheral vision. This put an evolutionary pressure on the primates. In order to overcome these pressures, primates started to live in groups.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.