Nothing Special   »   [go: up one dir, main page]
Scribd Logo
Upload

Welcome to Scribd!

  • 11K views

    Interaction Between Living Organisms

    Uploaded by

    aiyriss
    1) There are several types of interactions between living organisms including competition, symbiosis, prey-predator relationships, and commensalism. 2) Symbiosis can take the form of mutualism, where both species benefit; commensalism where one benefits and the other is not affected; and parasitism where one benefits and the other is harmed. 3) Biological control, where a predator is used to control pest populations, has advantages of not polluting the environment and only targeting pests, but a disadvantage is that increasing the predator population can later cause other issues if not properly controlled.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PPT, PDF, TXT or read online from Scribd

    Interaction Between Living Organisms

    Uploaded by

    aiyriss
    11K views27 pages
    1) There are several types of interactions between living organisms including competition, symbiosis, prey-predator relationships, and commensalism. 2) Symbiosis can take the form of mutualism, where both species benefit; commensalism where one benefits and the other is not affected; and parasitism where one benefits and the other is harmed. 3) Biological control, where a predator is used to control pest populations, has advantages of not polluting the environment and only targeting pests, but a disadvantage is that increasing the predator population can later cause other issues if not properly controlled.

    Copyright

    © Attribution Non-Commercial (BY-NC)

    Available Formats

    PPT, PDF, TXT or read online from Scribd

    Did you find this document useful?

    Is this content inappropriate?

    1) There are several types of interactions between living organisms including competition, symbiosis, prey-predator relationships, and commensalism. 2) Symbiosis can take the form of mutualism, where both species benefit; commensalism where one benefits and the other is not affected; and parasitism where one benefits and the other is harmed. 3) Biological control, where a predator is used to control pest populations, has advantages of not polluting the environment and only targeting pests, but a disadvantage is that increasing the predator population can later cause other issues if not properly controlled.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    11K views27 pages

    Interaction Between Living Organisms

    Uploaded by

    aiyriss
    1) There are several types of interactions between living organisms including competition, symbiosis, prey-predator relationships, and commensalism. 2) Symbiosis can take the form of mutualism, where both species benefit; commensalism where one benefits and the other is not affected; and parasitism where one benefits and the other is harmed. 3) Biological control, where a predator is used to control pest populations, has advantages of not polluting the environment and only targeting pests, but a disadvantage is that increasing the predator population can later cause other issues if not properly controlled.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    You are on page 1of 27

    Science process skills book = page S16 Science texts book = page 78

    Learning outcomes

    List
    Explain through examples the interactions between living organism

    Justify the importance of interaction between living organism and the environment
    Explain through examples the advantages and disadvantages of biological control in regulating the number of pests in certain area.

    INTERACTION BETWEEN ORGANISM

    COMPETITION

    SYMBIOSIS

    PREYPREDATOR

    COMMENSALISM

    MUTUALISM

    PARASITISM

    PREY-PREDATOR

    A prey is the organism that is eaten.


    A predator is an organism that kills eat and eat another organism. Prey-predator is a relationship where an animal capture and eats other animal.

    Characteristics of

    Predator = sharp claws and fang or sharp beak

    Prey = has ability to run away

    Example: owl is predator, rat is its prey.

    PREDATOR

    PREY

    COMPETITION

    Competition occurs when organism compete for basic resources.


    Plants compete to obtain water, minerals, sunlight and living place. Animals compete to obtain water, food, living space and mate for reproduction.

    COMPETITION

    INTRA-SPECIFIC COMPETITION

    INTER-SPECIFIC COMPETITION

    SYMBIOSIS

    Two or more different species which live close together and interact with each other.
    There are 3 type of symbiosis
    1. 2. 3.

    Commensalism Parasitism Mutualism

    COMMENSALISM

    A relationship between 2 organisms in which one organism (the commensal) benefit while the other(the host) does not receive any benefit or harm.

    COMMENSAL

    HOST

    Example: a remora fish often found attach under a shark, get free transport and feeds on food scraps left by the shark.

    MUTUALISM

    An interaction between 2 different species of organism which benefits both organism.

    This relationship helps both organism survive in harsh condition. Neither organism will be able to survive on its own. They obtain nutrition and shelter from each other.

    E XAMPLE

    OF MUTUALSIM

    Lichen consist of fungi and algae living together The algae produce food and the fungi provide shelter

    A sea anemone protect the clown fish from predators and provides it with food scraps
    The clown fish draws larger fish into the tentacle of the sea anemone.

    PARASITISM

    Parasite benefit by living in or outside the host. The host is harmed or maybe killed by the parasites.

    PARASITE

    HOST

    EXAMPLE: 1. Mosquitoes (parasite) live on the skin of mammals (host) and suck the blood of the host. 2. Tapeworm (parasite) lives in human intestine (host). Tapeworm obtains food and shelter. The host losing nutrient to the parasite and lose weight, become weaker.

    RAFFLESIA

    The importance of interaction between organisms

    In any ecosystem, when a population grows too large , organism of the same species will compete with each other for their basic needs.
    Some will die and this reduce the size of population.

    BIOLOGICAL CONTROL

    A method in which a predator is used to control the population of the pest in an area. Usually used in agriculture to control population of pest without the used of pesticides.

    Example

    Advantages of biological control


    1. 2.

    It does not pollute the environment It does not kill other organisms other than the pests because natural enemies of the pests are used. It is cheap and safe to use.

    3.

    Disadvantages of biological control

    In malaysia, an increase number of crow has posed a problem to people in Klang. Crows used to control the hawk moth. With food scraps available in Klang, the crow population increased.

    EXERCISES

    QUESTION 1

    The following are interactions between living things except

    A B C D

    competition parasitism prey - predator photosynthesis

    QUESTION 2
    Owls and snakes are reared in oil palm plantations to A help produce carbon dioxide for the photosynthesis of the oil palm plants control the population of pests reduce grass and weeds help pollination

    B C D

    3. What is relationship in which


    a) one organism has benefited and the other is harmed? PARASITISM

    b) both organisms have benefited? MUTUALISM c) one organism has benefited and the other is unharmed? COMMENSALISM

    L ET S

    DO EXERCISE

    SCIENCE PROCESS SKILLS BOOK = PAGE 70 - 73

    You might also like