B2~ Biology1

HideShow resource information
  • Created by: xmishaal
  • Created on: 09-06-15 20:38
View mindmap
  • B2~ Biology
    • Classification
      • Evolutionary relationships: How organisms are related.
        • Ecological relationships: How organisms interact with each other.
      • Natural Classification: Based on the evolutionary relationship and genetic similarities between organisms.
      • Artifical Relation ships: Based on appearance rather than genes- only used to identify organisms.
      • DNA sequencing: Allows us to see genetic difference between different groups of organisms.
    • Species
      • A species is a group of organisms which can interbreed with each other to produce fertile offspring.
      • Asexual Reproduction: An organism reproduces by making a copy of itself. There is no inbreeding with another organism.
      • Hybrids: If you interbreed a male and female from different species you'll get a hybrid. Hybrids are infertile and its difficult to classify them.
      • Organisms evolve over time. Sometimes they evolve so much that they produce a new species.
      • The binomial system: Each species is given a two part Latin name. The first part refers to the genus and the second part to the species.
    • Pyramids of Biomass and numbers.
      • Dry biomass: You'd dry out all the water from the organisms before weighing them.
      • Pyramids of biomass are almost always pyramid shaped whereas pyramid of numbers can be of any shape.
    • Energy Transfer and Energy flow
      • Energy lost at each chain of the food chain is for staying alive e.g respiration.
      • Material and energy are also lost as waste products.
        • Egestion is where food that cant be digestions passes out as feces.
        • Excretion is when the waste products are released e.g urine.
        • Food chains only go up to five trophic levels because so much energy is lost so that there wouldn't be enough.

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Energy flow through ecosystems resources »