Class Notes (808,754)
United States (313,251)
Boston College (3,500)
Biology (467)
BIOL 3030 (65)
Lecture 30

BIOL 3030 Lecture 30: Lecture 30: 4/7/2017

2 Pages
Unlock Document

Boston College
BIOL 3030
Christopher Kenaley

➢ Reproduction ○ Parity (live or out of an egg) and nutritional modes ○ Meeting physiological requirements of development ■ Oxygen ■ Food ■ Waste removal ■ Calcium: bone, muscle movement, neurons ○ direct/indirect development ■ Metamorphosis ■ Plasticity of life stage ➢ Sex determination in lizards ○ Phylogeny to reconstruct transitions in sex determination ■ Gsd then tsd ■ Tsd: not homologous: evolved many times ● Sources of error: can affect an entire phylogeny ➢ Hermaphroditism: male and female ○ Ray finned: lots of hermophrodites ■ Evolved 5-6 times ➢ Parity modes ○ Oviparity modes: eggs ■ Develop outside mom, passive environment interaction ■ lecithotrophy ○ Viviparity: eggs inside mother ■ Born alive, active interaction with environment ■ matrotrophy ➢ Nutritional modes ○ Lecithotrophy: nutrition from stored yolk ○ Matrotrophy: nutrition from current maternal physiology ■ Placenta, umbilical cord ➢ Ancestral parity mode ○ oviparity/lecithotrophic: ■ Oxygen ■ Food: yolk ■ Waste removal: diffusion ■ Calcium: not egg shell, yolk ○ Ocean ■ Danger: eggs are out there floating around ■ Smaller growth because egg cant get big ● Amount of yolk is limited ■ Tradeoff: embryo growth and yol
More Less

Related notes for BIOL 3030

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.