Welcome to Mr. Haarmann’s Biology 101 Class!
Today’s Topic:
Food Chains
Food Chain
The Sun: We can not live without the
sun. It is the ultimate producer.
Producer: Produce glucose and energy
without eating anything, uses
photosynthesis to create energy.
Consumer: Consumers come in two
types:
Omnivores: Eat both plants and meat.
Herbivores: They only eat plants.
Carnivores: They only eat meat.
Consumers are in levels:
Primary Consumers: Typically
herbivores
Secondary Consumers: Eats the
primary consumer
Tertiary Consumer: Eats the secondary
consumer.
Within Food Chains, the populations of the consumers vary depending on the
level of consumption.
Ex: There are more giraffe in the African Savannah compared to lions.
• An organism’s level on the food chain determines the population level.
• Therefore that is why plants are more plentiful than lions.
• An area can only have so many organisms within its carrying capacity. The
carrying capacity of a biological species in an environment is the
population size of the species that the environment can sustain
indefinitely, given the food, habitat, water and other necessities available
in the environment. In population biology, carrying capacity is defined as
the environment's maximal load
• A habitat has a limited amount of resources, such as food, water and
shelter available.
• The assumption that if an organism doesn’t use it, they lose it, is
completely FALSE! Adaptations take hundreds of years to be taken into
effect.
REVIEW!
• Food Chains must contain the sun. Without the sun, there is
no life.
• Food Chains are made up of the sun, consumers and
producers.
• Consumers are either Omnivores, Herbivores and Carnivores.
• The higher on the food chain goes up, the population
declines.
• The carrying capacity of a habitat is the amount of organisms
it can hold at a consistent rate by being able to provide the
necessities. (Food, Water and Shelter)
• When a carrying capacity is exceeded, it is survival of the
fittest. The most adapted will survive, this is how the genetic
gene pool is narrowed down to the qualities we see in
organisms today.
READY….
SET.…
QUIZ!
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