ecology Flashcards

1
Q

what is a habitat

A

the environment in which an animal lives in

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2
Q

what is population

A

the population is the total number of species within the same geographical area

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3
Q

what is a community

A

a community is the populations of a wide variety of species living in the same habitat

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4
Q

what do plants compete for

A

light, space, water and mineral ions in the soil

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5
Q

what do animals copete for

A

food, water, mating partners and territory

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6
Q

what are examples of biotic factors

A

availability of food, introduction of a new predator, competition and new pathogens

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7
Q

what are examples of abiotic factors

A

light intensity, temperature, water, pH, abundance of mineral ions, wind intensity and availability of carbon dioxide and oxygen

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8
Q

what are structural adaptations

A

adaptations that affect the body shape or structure of an organism

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9
Q

what are functional adaptations

A

adaptations that affect the body functions of an organism

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10
Q

what are behavioral adaptations

A

adaptations that affects the animals behavior or lifestyle

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11
Q

what is an extremophile

A

it is an organism that is adapted to live in very extreme conditions

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12
Q

what is the formula for estimated total population size

A

(total area/area sampled) * number of organisms counted in sample

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13
Q

what is the only way that carbon can enter the carbon cycle

A

photosynthesis

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14
Q

what conditions increase the rate of decay

A

temperature,moisture, availability of oxygen

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15
Q

what are the products of anaerobic decay

A

a range of gasses including methane called biogas

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16
Q

what are the biological threats to food security

A
  1. increase in population
  2. new pests and pathogens
  3. environmental change
  4. increased costs
  5. conflicts