Biology CARNES AP BIO

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Biology Eighth Edition Neil Campbell and Jane Reece Lectures by Chris Romero updated by Erin Barley with contributions from Joan Sharp BIG IDEA II Biological systems utilize free energy and molecular building blocks to grow to reproduce and to maintain dynamic homeostasis Enduring Understanding 2 D Growth and dynamic homeostasis of a biological system are influenced by changes in the system

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Essential Knowledge 2 D 1 All biological systems from cells and. organisms to populations communities and ecosystems are affected by complex biotic and abiotic. interactions involving exchange of matter and free energy. Learning Objectives, 2 22 The student is able to refine scientific models and. questions about the effect of complex biotic and abiotic. interactions on all biological systems from cells and organisms to. populations communities and ecosystems, 2 23 The student is able to design a plan for collecting data to. show that all biological systems cells organisms populations. communities and ecosystems are affected by complex biotic and. abiotic interactions, 2 24 The student is able to analyze data to identify possible. patterns and relationships between a biotic or abiotic factor and. a biological system cells organisms populations communities. and ecosystems, Copyright 2008 Pearson Education Inc publishing as Pearson Benjamin Cummings. Cell activities are affected by interactions with,biotic and abiotic factors.
Illustrative examples of biotic factors include,Cell density. Illustrative examples of abiotic factors include,Temperature. Water availability, Copyright 2008 Pearson Education Inc publishing as Pearson Benjamin Cummings. Cell Density, In addition to many internal chemical factors studies. using animal cells in culture have led to the, identification of many external factors both chemical.
and physical that can influence cell division and,therefore control cell density. Contact cell cycle control mechanisms include density. dependent inhibition and anchorage dependence, In density dependent inhibition crowded cells stop dividing. Anchorage dependence is a phenomenon in which cells must. be attached to a substratum i e extracellular matrix of a tissue in. order to divide, Copyright 2008 Pearson Education Inc publishing as Pearson Benjamin Cummings. Anchorage dependence,Density dependent inhibition,Density dependent inhibition. a Normal mammalian cells b Cancer cells,Metabolic cooperation between different.
prokaryotic species often occurs in surface,coating colonies known as biofilms. Cells in a biofilm secrete signaling molecules that. recruit nearby cells causing the colonies to grow, The cells also produce proteins that stick the cells. to the substrate and to one another,Channels in the biofilm allow nutrients to reach. cells in the interior and wastes to be expelled, Copyright 2008 Pearson Education Inc publishing as Pearson Benjamin Cummings. 1 Individual rod,shaped cells,2 Aggregation in,3 Spore forming.
fruiting body,Fruiting bodies,Organism activities are affected by interactions. with biotic and abiotic factors,Illustrative examples of biotic factors include. Predator prey relationships,Illustrative examples of abiotic factors include. Water nutrient availability,Temperature, Copyright 2008 Pearson Education Inc publishing as Pearson Benjamin Cummings. Symbiosis is a relationship where two or more, species live in direct and intimate contact with one.
Parasitism,Commensalism, Copyright 2008 Pearson Education Inc publishing as Pearson Benjamin Cummings. Fig 54 UN2,Predator Prey Relationships, Predation is a type of density dependent population control whereby there. is a biological interaction where a predator an animal that is hunting. feeds on its prey the animal that is attacked, Copyright 2008 Pearson Education Inc publishing as Pearson Benjamin Cummings. Wolves Moose,Number of wolves,Number of moose,1955 1965 1975 1985 1995 2005. Copyright 2008 Pearson Education Inc publishing as Pearson Benjamin Cummings. The stability of populations communities and ecosystems. is affected by interactions with biotic and abiotic factors. Illustrative examples of biotic factors include,Food chains food webs.
Species diversity,Population density,Algal blooms,Illustrative examples of abiotic factors include. Water nutrient availability, Copyright 2008 Pearson Education Inc publishing as Pearson Benjamin Cummings. Food Chains Food Webs,Trophic structure is the feeding relationships. between organisms in a community it is a key,factor in community dynamics. Food chains link trophic levels from producers,to top carnivores.
A food web is a branching food chain with,complex trophic interactions. Copyright 2008 Pearson Education Inc publishing as Pearson Benjamin Cummings. Quaternary,Carnivore Carnivore,Carnivore Carnivore. Carnivore Carnivore,Herbivore Zooplankton,Plant Phytoplankton.

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