BIOL 2P02 Lecture Notes - Bacteroides, Proteobacteria, Archaea

58 views4 pages

fuchsiahare261

28 Oct 2011

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Chapter #4: cell bio (skandales, october 27th: part i. > life is determined by reproduction, heredity, metabolism, compartmentalization. homeostasis. responsiveness. > not easy to define ex: fire consumes things but has no genetic materials. > a system that can go on without change is not alive. > darwin did not come up with evolution, but the mechanisms tor natural selection. s ent with modifications is the only property. > ~500 million years for crust to solidify. > oldest fossils 3. 5 billion years old (embedded in western australia) > 3. 5-abilities years ago the first divergence of bacteria & archae occurred. > fossilized evidence of bacteria are stroma ta lites. , found in layers making up prebiotic prokaryotic mats. > earth was hotter with less oxygen (anoxic) > life was obeying the central dogma of molecular biology (information flow) > life on earth operates under flow of information. > need proteins to replicate dna, cannot create proteins without dna: catch 22.

Related Questions

An African monkey has a DNA sequence that is 96.66% similar to a human sequence. According to the molecular clock, about how long ago did the common ancestor for African monkeys and humans live?

2.5â3 million years ago

5â6 million years ago

13â16 million years ago

17â20 million years ago

Humans and chimpanzees have a common ancestor that lived approximately 5 million years ago. Scientists have amassed an impressive collection of fossils for ancestors to modern humans and placed these ancestors in chronological order to observe the changes that occurred as these organisms evolved more human-like characteristics. Which lines of evidence provide the basis for stating that humans and chimps have a common ancestor that lived approximately 5 million years ago?

homologous structures in humans and chimps

DNA sequence similarity

changes in bone structure

vestigial structures in humans

Which description applies to a vestigial structure or trait?

It is the result of convergent evolution.

It represents evidence supporting the common descent and separate types models for modern organisms.

It did not have a necessary function in more ancestral organisms, but it does in more evolved organisms.

It is a type of homologous trait that is found in diverse organisms.

Which organisms are most closely related?

Bears and raccoons, which are both in the order Carnivora

Cougar and lynx, which are both in the family Felidae

Bread molds and yeast, which are both in the kingdom Fungi

Woodpeckers and warblers, which are both In the class Aves

How do multiple lines of evidence (from the field, the fossil record, and molecular genetics) work together to illustrate stickleback evolution?

Select all that apply.

The fossil data show a pattern of evolution over long stretches of time.

If the same morphological changes occur in the fossil record as in living populations, we might deduce that the genetic mechanism discovered in the living populations might be responsible for the changes observed in fossils.

Data obtained by analyzing living fish in lakes show the selective pressures present in different environments.

We cannot draw any conclusions from recent data because evolution takes millions of years.

Genetic evidence reveals the precise molecular mechanism responsible for the change in pelvic structures in stickleback populations.

1. James Hutton was the first to propose that geological change occurred gradually by the accumulation of small changes from processes that are occurring today, but who was the first to popularize this idea with additional geological evidence and to inspire Darwin to consider that the earth is millions of years old instead of only thousands of years old?

Charles Lyell

Charles Darwin

Jean-Baptiste Lamarck

Aristotle

Aristotle was perhaps the first person to classify organisms, but who was the first to develop a systematic approach to classifying organism in the 1700s that is still partly used today?

Galen

Carl Linnaeus

Stephen J. Gould

Ernst Mayr

A multicellular eukaryote that contains cell walls but is not capable of photosynthesis is most likely a(n)

fungus

plant

bacteria

animal

Which of the following best explains the significance of Charles Darwinâs contribution to biology?

		Darwin was the first to suggest a plausible mechanism of evolution and provided several lines of evidence to support evolution and his mechanism.
		Darwin was the first person to suggest a mechanism for evolution.
		Darwin was the first to suggest that animals descended from other animals.
		Darwin was the first to suggest that fossils were evidence of organisms that no longer existed.

BIOL 2P02 Lecture Notes - Bacteroides, Proteobacteria, Archaea

Document Summary

Get access

Related Documents

BIOL 1F25 Study Guide - Final Guide: Chow Chow, Dinofelis, Devonian

BIO_SC 1500 Study Guide - Midterm Guide: Ferrous, Protist, Lightning

BIOL 202 Chapter Notes - Chapter 20-21: Living Fossil, Autocatalytic Set, Autocatalysis

Related Questions