Biology EOI next week! . EOI Review Pictures. 1. Section 2.2 Summary – pages 46 - 57. Pyramid of Energy. Heat. 0.1% Consumers. Illustrates that the amount of available energy _______ at each succeeding trophic level. 1% Consumers. Heat. 10% Consumers. Heat. decreases. 100% Producers.
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The nitrogen cycle
Nitrogen in the atmosphere
Some excess nitrogen evaporates from soil.
Dead plant matter
Urine from animals
Assimilated by plants
Decomposers—bacteria and fungi—break down tissues and wastes and nitrogen-containing compounds are released.
Nitrogen-fixing bacteria in the nodules on roots of leguminous plants fix atmospheric nitrogen.
Released to the atmosphere
Nitrogen compounds released into soils and acted upon by soil bacteria
Converted to other nitrogen compounds by soil bacteria
Nitrogen-fixing soil bacteria
5Section 2 Check
Honey mesquite (pods eaten by beetles)
Prickly pear cactus
Kangaroo rat (seed eater)
Red spotted toad
Mexican whiptail lizard
Texas horned lizard
The results of diffusion
Material moving out of cell equals material moving into cell
Limiting factors, such as availability of food, disease, predators, or lack of space, will cause population growth to slow.
The graph of a growing population starts out slowly, then begins to resemble a J-shaped curve.
Population Growth of Houseflies
XX = female
XY = male
= affected Male
= affected Female
= known heterozygous “carriers”
Light-Dependent ReactionsSection 9.2 Summary – pages 225-230
Light energy transfers to chlorophyll.
Chlorophyll passes energy down through the electron transport chain.
Energized electrons provide energy that
for the use in light-independent reactions
GlycolysisSection 9.3 Summary – pages 231-237
2 Pyruvic acid
4ADP + 4P
2NADH + 2H+
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