Biology 100- Chapter 15

Front 1

spontaneous generation

Back 1

it was commonly believed that life could regularly arise from nonliving matter

Front 2

Cambrian Explosion

Back 2

rapid diversification during a span of 15 million years, all major animal body plans evolved today

Front 3

Biogenesis

Back 3

"life from life" principle. all life arises only by the reproduction of preexisting life. not spontaneously generate from nonliving matter

Front 4

Origin of Life

Back 4

The first stage involves the production of small organic molecules like amino acids and nucleotide monomers. In the second stage, scientists theorize that organic monomers spontaneously combined to form polymers (e.g., proteins and nucleic acids). During the third stage of the origin of life, scientists believe that pre-cells formed. Pre-cells are packages of molecules that have some properties of life like a selectively permeable surface, but they lack the complexity of true cells. Finally, during the fourth stage, self-replicating molecules formed, which were the precursors to genes and DNA.

Front 5

Origin of Life

Back 5

1.synthesis of small organic molecules

2. joining of molecules into macromolecules

3. packaging of all these molecules into pre cells

4. self replicating molecules that eventually made inheritance possible

Front 6

1. Exotoxins and Endotoxins
2. Prokaryotes and Bioremediation
3. Protists
4. Endosymbiotic Theory
5. Pathogenic Prokaryotic Organisms

Back 6

still need to do

Front 7

Bacterial shapes

Back 7

There are three cells shapes: cocci, bacilli, and spirilla.Cocci are spherical (round) and can occur in clusters or chains. Bacilli are rod-shaped, and spirilla are spiral or curved shaped.

Front 8

binary fission

Back 8

a process that prokaryotes reproduce whereby a single cell divides into two cells.

Front 9

endospore

Back 9

Certain prokaryotic cells are able to withstand extreme environmental conditions by forming a thick, protective coat around the cell,

Front 10

photoautorophs

Back 10

mostly plants, light, species that obtain carbon from inorganic compound carbon dioxide

Elodea an aquatic plant

Front 11

photoheterotrophs

Back 11

light, obtain carbon from at least one organic nutrient, the sugar glucose

Rhodopsuedomonas

Front 12

chemoautotrophs

Back 12

most animals, species that obtain energy from environmental chemicals

bacteria from hot spring

Front 13

chemoheterotrophs

Back 13

Little Owl, dominant amount multicellular organisims