{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Wednesday March 17

Wednesday March 17 - Why is the amniotic egg considered an...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Why is the amniotic egg considered an important evolutionary breakthrough? It . 1. Has a shell that increases gas exchange 2. Allows incubation of eggs in a terrestrial environment 3. Prolongs embryonic development 4. Provides insulation to conserve heat energy Reptiles The reptile clade includes the tuatara, lizards, snakes, turtles, crocodilians, birds, and the extinct dinosaurs Have scales that create a waterproof barrier Lay shelled eggs on land Mostly ectothermic - Absorb ext ernal he at as the m ain source of body he at - Exception is the birds, which are endother mic Turtles The m ost distinctive group of reptiles alive today All turtles have a boxlike shell m a d e of upp er and lower shields that ar e fused to the vert ebra e, clavicles, & ribs. Lepidosaurs Two lineag es of lepidosaurs - Tuataras - Squa m at es Tuataras- lizard-like reptiles Squa m at es include the lizards and sn akes Archosaurs Includes the Dinosaurs (extinct) and the living Crocodilians and Birds
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern