The characteristics of life Flashcards
What is metabolism?
all the chemicals reactions that occur in the cell of an organism.
give 5 examples of metabolism
growth, movement, response, respiration and reproduction
what is life?
life is the procession of all the 5 characteristics of life to carry out all the reactions needed to survive and reproduce
what do organisms need to be considered alive?
they need all 5 characteristic of life
what are the 5 characteristics of life?
- organisation
- nutrition
- excretion
- response
- reproduction
what is the continuity of life?
all living things come from other living things of the same type
what is organisation?
living things are composed of cells, tissue,organsand organs systems
what is a unicellular organism?
a organism made up of one cell
give an example of an unicellular organism
bacteria
amoeba
what is a multicellular organism ?
an organism made up of many cells
give an example of a unicellular organism
humans
how is tissue formed?
groups of similar cells form tissue
how are organs formed?
many tissue forms organs
how are organ systems formed?
many organs from organ systems
how are organisms formed?
organ systems form organisms
what is nutrition?
the way organisms obtain and use food
what are the two types of nutrition?
autotrophic and heterotrophic nutrition
what is autotrophic nutrition ?
the way green plants make their own food by photosynthesis using sunlight energy
what is heterotrophic nutrition?
organisms that take in food from other organisms
give the two types of heterotrophic nutrition
parasites and saprophytes
what are parasites
organisms that live on a live host and take in food from the host causing it harm
what are saprophytes?
organisms that live on a dead organism /matter , taking food from it.
give an example of a heterotroph
humans
rabbits
give an example of a parasite
fleas, lice , tics , worms
give an example of a saprophyte
bacteria and fungi of decay
what is excretion?
the removal of waste products of metabolism from the body
how do animals excrete waste?
animals excrete waste using their excretory organs
what are animals excretory organs?
skin lungs and kidneys
how to plants excrete waste?
plants excrete a little gaseous waste through tiny holes called stomata.
why do plants have little waste?
as they make their own food by photosynthesis
what is response?
the way organisms react to change, called stimuli, in their environment
what are stimuli?
changes in the environment
how do animals respond to stimuli?
animals use their sensory organs to respond quickly to stimuli in their environment
what stimuli do animals respond to ?
light, sound, smell, taste and touch
what are animals sense organs?
tongue, skin, eyes, ears, nose
how do plants respond to stimuli?
plants grow and move slowly in response to the stimuli in their environment.
what stimuli do plants respond to ?
light, gravity, touch , water and chemicals
what is reproduction?
the ability of organisms to produce new individuals of the same species
what is asexual reproduction?
one parent dividing to produce two or more identical offspring
give an example of an organism that uses asexual reproduction
strawberries, potatoes
what is sexual reproduction?
involves the joining of two sex cells formed from two parents. the offspring have characteristics of both parents.
give an example of an organism that uses sexual reproduction
humans
