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Flashcards in Ecosystems Deck (49):
1

Producers and autotrophs

Organism at the base of the food chain that does not need to feed on other organisms.

2

Photosynthesis

The food making nprocess in plants that takes place in chloroplasts within cells.

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Cellular respiration

The chemical reaction involving oxygen that moves the energy in gluecose into the compound ATP

4

Aerobic respiration

The chemical breakdown of food using oxygen . The reaction needs enzymes, occurs in all body cells and releases energy.

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Glycolysis

Process by which gluecose is converted into a simple form during which energy is released.

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Krebs cycle

Part of the areobic respiration process in which carbon dioxide and ATP are produced.

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Electron Transport chain reactions

Part of the areobic repiration process

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Mitochondria

Small rod-shaped organelles that supply energy to other parts of the cell.

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Anaerobic respiration

The chemical breakdown of food without oxygen. The reaction needs enzymes occurs in cells and releases less energy than aerobic respiration.

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Lactic acid

An end product of anaerobic repiration in animals also known as lactate

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Organism

Living thing

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Spieces

A group of living organisms capable of interbreeding with each other but not a different spieces.

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Population

A group of individuals just like a spieces living in the same area at a particular time

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Community

More than one population living in the same area at a time

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Eco system

Communities of organisms that interact with each other and their enviroment.

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Ecology

The study of eco systems

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Producers

Organism at the base of the food chain that does not need to feed on the other organisms also known as an autotroph.

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Decomposers

Organisms that break down organic matter into inorganic materials

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Photosynthesis

The food making process in plants that takes place in chloroplasts within cells. The process uses carbon dioxide water and energy.

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Consumers

An organism that relies on other organisms for its food.

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Herbivores

Animal that only eats plants

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Primary consumer

The first consumer in a food chain also known as first order consumer.

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Carnivores

An animal that eats other animals

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Omnivores

Animal that eats plants and other animals

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Detritvores

Animal that feeds on and breaks down dead plant or animal matter

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Compettition

The struggle among organisms for food and territory

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Parasitism

A parasite living in another species otherwise known as the host.

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Mutualism

Relationship between two different organisms in which both benefit

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Commensalism

Relationship between organisms where one benefits and the other is unaffected

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Interspecific competition

Competition between different species

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Intra specific competition

compettition between the same spieces

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Predator- Prey relationship

Relationship between organisms that kills and eats another species for example a lion and a zebra

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Symbiotic relationships

Very close relationship between two organisms of different species. It may benefit or harm one of the partners

34

Carrying Capacity

The amount of an organism the eco system can handle.

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emmigration

Leaving somwhere

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Immigration

Arriving somewhere.

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Chemosynthetic

Describes organisms that produce organic material using energy released from chemical reactions rather than light.

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Food chain

diagram that shows how the energy stored in one organism is passed to another

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Food web

diagram showing several food chains joined together to demonstrate that animals eat more than one type of food

40

Trophic level

a level within a food chain, food web or food pyramid

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Energy pyramids

a representation of the level of food energy at each level within a food chain

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Pyramid of numbers

a representation of the population, or numbers of organisms, at each level within a food chain

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Pyramid of biomass

a representation of the dry mass of organisms at each level within a food chain

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Birth rate

the number of organisms within a population that are born within a particular period of time

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Death rate

the number of organisms within a population that die within a particular period of time

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Exponential growth

a rapid increase in number or size, represented by a J-shaped graph

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Sigmoid:

the shape of a graph that shows a population increasing in number then reaching a plateau

48

Equilibrium, Plateau phase or steady state

a state in which conditions are balanced and there is neither growth nor a decrease in number; also known as steady state or plateau phase

49

Zero population growth:

the point at which birth and death rates balance each other out