GEL_LEC - LEC 6 P1 S4 monsoon better for biodiversity P4 S3 Faunal Provinces collection of species Indo-pacific mostly same because of same

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
LEC 6 P1 S4 monsoon better for biodiversity P4 S3 Faunal Provinces: collection of species Indo-pacific, mostly same because of same latitude P5 S1 Having a lot of north-south coastlines, especially in low latitudes, is generally good for biodiversity P17 S3 outside factor: mass extinction LEC 8 … (missing lec. notes)… P22 S2 Need Gill Arch to make jaw P24 S3 “True Teeth” Need top three (enamel, dentine, pulp cavity) to be real true teeth P26 S3 Operculums present in Acanthodes P27 S4 Lobefin has muscles, rayfin doesn’t LEC 9 P2 S4 Particles in water have nutrients; beings underwater must not be too used to food floating around you if you want to leave the water P4 S4 Oldest record of a land plant (upper Cambrian) P5 S3 Hornworts, liverworts do not have vascular system; very basal P6 S17 Tracheid: vascular P7 S17 Vascular good b/c when cells die, becomes wood (making trees) P9 S2
Background image of page 1

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

View Full DocumentRight Arrow Icon
Arthropods can move onto land due to plants that keep the area moist P11 S1 Choana: nose attached to mouth; can breathe with mouth closed P12 S1 Omg, tiktaalik had separated shoulders from the skull LEC 10 P1 S4 Lissamphibians: “smooth amphibians” P3 S3 3 living lissamphibian groups > salientia (frogs), caudate (salamanders), gymnophiona (caecilians); they have pedicellate teeth, tooth crowns bicuspid or multicuspid; do not have jaw P4 S2 Have special hips P11 S1 Temnospondyli: “cut vertebrate” Lecture 1: Beginning of Life 1) How old is the earth and when did life appear? 2) What was the first life? - What is life? - What is the simplest form?
Background image of page 2
3) How was life formed in what environment? 4) Does extraterrestrial life exist? 1. Ca. 4.6 billion years old, life appeared ca. 3 to 3.5 billion years ago. We know this because of carbon isotopes 2. Life is an organic compound capable of reproduction - Containing DNA and/or RNA - Simplest form of life is something like retrovirus but is capable of reproduction without a host (thanks to ribosomes) 3. – atmosphere first created by gases and vapor surrounding the Earth. As water vapors cooled down, it formed water and created the ocean. Carbon dioxide cooled to form rocks. - Early environment or earth surface was chemically and physically challenging, but that is where life evolved - Today’s earth: good for us, bad for primordial life to start - Early earth: bad for us, good for primordial life to start - Energy sources for vapors: lightning, heat, UV - To make a retrovirus-like structure, connect monomers to form polymers (chain or monomers), esp. RNA. Encase it within a membrane - Heterotroph: consumes other chemicals to produce energy - Autotroph: produces energy on its own 4. – life needs liquid water and a crust to hold the water Lecture 2: Actual Record or Early Life 1) What preserves records of life and how likely is the preservation? 2)
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/30/2011 for the course GEL 3 taught by Professor Motani,r during the Spring '08 term at UC Davis.

Page1 / 7

GEL_LEC - LEC 6 P1 S4 monsoon better for biodiversity P4 S3 Faunal Provinces collection of species Indo-pacific mostly same because of same

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online