Ponds whereas red legged frogs mate in fast moving

Info icon This preview shows pages 6–9. Sign up to view the full content.

View Full Document Right Arrow Icon
ponds, whereas, red-legged frogs mate in fast-moving short lasting streams. Two different species of snakes mate, the zygote forms; however, it dies after only a few cell divisions Two species of salamanders breed during different times of the day. A male lion mates with a female tigress to produce a sterile liger Two orchids are unable to fertilize each other because their flower petals are specifically shaped for different pollinators. 7. If evolution isn’t goal oriented, why do species change over time? V. Evidence for Evolution: Read pages 299-304 1. Why are older fossils generally in deeper rock layers than younger fossils?
Image of page 6

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

View Full Document Right Arrow Icon
Name: ________________________________________________ Period: ____ Date: ___________ 2. How are fossils formed? Refer to p. 299 in the book. 3. What is the difference between homologous and analogous structures? 4. Humans, cats, whales, and bats all have structurally similar forelimbs. What does this suggest? Explain. 5. Vertebrates and cephalopods have independently developed a camera like eye. In vertebrates the eye focuses light by changing the shape of the lens, whereas in cephalopods such as octopi, the lens focuses by moving forward and back like a camera lens. Are these two types of eye structures considered homologous or analogous structures? What kind of evolution led to similar, but structurally different eyes? 6. What is a vestigial structure? State two examples. 7. Why may certain traits over many generations become vestigial? Explain using an example. 8. How can you tell which organisms are more closely related when looking at embryos at different stages of development?
Image of page 7
Name: ________________________________________________ Period: ____ Date: ___________ 9. How can a scientist tell which species are most closely related when examining the same gene between different species?
Image of page 8

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

View Full Document Right Arrow Icon
Image of page 9
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