biology science 💋⭐️🪩🎀

• Community


  Two or more populations of organisms
• Ecosystem


  Two or more populations of organisms (usually many more) in their environment
• Population


  All the organisms of the same or closely related species
• Habitat


  A place where an organism lives, where they can find shelter for protection
• Habitat


  • Provides living things with everything they need to survive
  • Different habitats across the world have different organisms living in them
  • Habitats come in all sizes, from gigantic rainforests or deserts to small habitats
• example


  • For example, a dead log, a garden or even a (single) plant
• Mutation


  A permanent random change in the DNA
• Adaptations


  Modification of an organism or its parts that makes it more fit for existence under the conditions of its environment: a heritable physical or behavioral trait that serves a specific function and improves an organism's fitness or survival
• It is only your sex cells which are passed onto your children, if the mutation is not in the gametes than it will not be passed onto the child
• When DNA is changed, then our physical characteristics can change as well
• Mutations are usually harmful, however can sometimes be an advantage
• Genetic variation allows a species to adapt to its changing environment
• Mutation


  • A mutation occurs in a fruit making it resistant to disease, this is an advantage as other fruit gets killed off
  • A mutation causes a fish to be bigger, this gives it the size and strength to compete for more food
  • A smaller animal could move faster through a thick forest as it can hide from prey
• Natural selection


  1. Variation

  2. Adaptation

  3. Reproduction

  4. Passing on alleles
• Mutation


  Where a change in the DNA structure occurs, changing how the cell runs, grows, and reproduce. The change can happen by mistake, by toxins, or radiation from the sun.
• feeding groups

  Producers -  make food using materials from the environment and energy from sunlight. (ex. Plants)

  Consumer: Animals that eat other living things

  Two main types 

  Primary Consumer -  Animals that only eat plants (ex. Herbivores) 

  Secondary Consumer -  Animals that only eat other animals (ex. Carnivores) 

  Omnivore – Animals that eat both plants and animals 
• why biodiversity is essential to a health population 


  Biodiversity is essential for the processes that support all life on Earth, including humans. Without a wide range of animals, plants and microorganisms, we cannot have the healthy ecosystems that we rely on to provide us with the air we breathe and the food we eat. 
• predator and prey relationship

  A predator is an organism that eats another organism. 

  The prey is the organism which the predator eats.

   Some examples of predator and prey are lion and zebra, bear and fish, and fox and rabbit
• predation

  Predation is a relationship in which members of one species (the predator) consume members of another species (the prey). A predator-prey relationship keeps the populations of both species in balance
• Organism adaptations


  • Help it survive in its habitat
• Variation


  Differences (in DNA) in individuals of populations/species
• Variation in shell colour

  • Light brown
  • Dark brown
  • Yellow
• During drought, the grass turned very brown and died
• Brown shelled snails are more camouflaged compared to other colours


  They are not preyed on as easily by birds
• Brown shelled snails survive more and reproduce more


  Brown-shelled alleles get passed onto the next generation and increase in population
• Without variation, the process of natural selection would not be able to occur and the snails would all have been eaten possibly causing the population to die out / species to become extinct