What is the process of classification?
the process of grouping living things done accordingly to how closely related they are
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what are prokaryotes?
microscoped single celled organisms, with no true necleus just a circular molecule of DNA
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What are procitsts
Organisms that dont fit with other kingdoms and are usually single celled.
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definition of species?
a group off similar organisms that can breed together to produce fertile offspring
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Definition of a hybrid?
An organism that is produced by two different species breeding, the offspring is in fertile
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what are producers and consumers?
producers produce their own food (prey) and consumers cannot so they eat the producers.
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What is excretion and egestion?
egestion= getting rid of waste naturally by pooing and excretion= getting rid of them unnaturally
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What does a pyramid of numbers show?
the number of organisms at each stage of a foodchain.
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What does a pyramid of biomass show?
the mass of living material at each stage of the food chain
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what is the definition of the carbon cycle?
The series of processes by which carbon compounds are converted within the environment and is returned to the atmosphere by repiration
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Name a process which returns carbon to the air?
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Name a process that removes carbon from the air?
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why do scientists want to save endangered species?
prevent damage to food chains
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why do dead plants decompose in marshes?
Because there is less oxygen available
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What does nitrogen fixing bacteria do?
It takes nitrogen in the air and converts it to get nitrates.
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What is an ecological niche?
The specific role of an organism within its environment. eg where it lives, what it does there, what it eats etc
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What is a parasite
a parasite feeds of of another organism and harms it.
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what is mutualism?
two things that live together and benefit from eachother eg a shark and a fish
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what is interdependance?
The mutual dependance of one organism with another
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Name the stages of natural selection
There is a genetic variation in a population, competition for food, smaller animal will die.
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how do cactuses adapt to warm weather
Spikes- to protect them from any animals trying to eat them and they have spines instead of leaves to minimise the surface area and reduce water loss by transpiration
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What was darwins theory?
There is prescence of natural variation, competition for limited resources, survival for the fittest, inheritance of successful adaptions,
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How can endangered species be helped?
sponsering animals, protect habitats, legal protection, education programmes, captive breeding programmes,
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Reasons to conserve animals
protecting human food supply, ensuring minimal damge to food chain, future identification of plants for medical purposes, cultural aspects
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What is sustainable development?
using the Earths resources as a rate at which they can be replaced.
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what are prokaryotes?


microscoped single celled organisms, with no true necleus just a circular molecule of DNA

Card 3


What are procitsts


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Card 4


definition of species?


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Card 5


Definition of a hybrid?


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