Interactions between organisms and the environment

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4 Factors that Change Population Size

1. birth (increase) 2. immigration (increase) 3. death (decrease) 4. emigration (decrease)

Acclimation

a change at the individual level in response to an environmental factor (turned on and off)

Carrying Capacity

the number of organisms that can be supported by an environment

2 Basic Patterns in Population Growth

1. EXPONENTIAL GROWTH 2. LOGISTIC GROWTH

Biomes

Different types of habitats found on land

Exponential Growth

conditions required: abundant resources

Logistic Growth

conditions required: battle for resources/ limited resources death

Behavioral adaptations

ex: desert mice that sleep during the day because its hot

Morphological adaptations

ex: small furs= less surface area/exposed to snow

Physiological adaptations

happen inside your cells

Population growth

higher birth rate than death rate

Population

members of the same species that interact through gene flow

Adaptation

natural selection, characteristics that are in DNA, gene control of some aspect of that organism (only changes over generation)


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