Classification

Unicellular- Made of a single cell.

Multicellular- Made of many cells.

Autotroph- The organisms make their own food, via photosynthesis.

Heterotroph- These organisms eat and digest other organisms.

Saprophytic- These organisms eat and digest organisms externally.

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Classification

Unicellular- Made of a single cell.

Multicellular- Made of many cells.

Autotroph- The organisms make their own food, via photosynthesis.

Heterotroph- These organisms eat and digest other organisms.

Saprophytic- These organisms eat and digest organisms externally.

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Classification

Animalia- Multicellular; Heterotrophic feeders so no chlorophyll; no cell walls; complex cell structure with nucleus.

Plantae- Multicellular, autotrophic feeders using chlorophyll; cell walls made of cellulose; complex cell structure with nucleus.

Fungi- Multicellular; cell walls not made of cellulose; saprophytic feeders so no chlorophyll; complex cell structure with nucleus.

Protoctista- Mostly unicellular (a few are multicellular); complex cell structure with nucleus.

Prokaryotae- Unicellular; simple cell structure with no nucleus.

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Classification

How do mammals keep their internal body temperature constant?

  • Shiver.
  • Sweat
  • Respiration.
  • Produce goosebumps.
  • Hair follicles stand up or lay down.

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Classification

What is a species?

A species is a group of organisms that can interbreed to produce fertile offspring.

What is a hybrid?

A hybrid is a mixture of 2 different species that cannot reproduce.

Binomial System-

  • The first part is the genus and this is shared by closely related species.
  • The second part of the name defines the particular species in the genus.
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Classification

KINGDOM               King    

PHYLUM                  Prawn

CLASS                      Curry

ORDER                    Ordered   (by)

GENUS                     Genius

SPECIES                 SUP

              

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Classification

Animalia              Animal                     Animalia           Animal     

Chordata             Spinal Chord            Chordata         Spinal Chord

Mamalia               Mammal                   Mamalia           Mammal

Carnivora            Meat Eater                Omnivora         

Felidae                Cat Family                Hominidae       Man like

Panthero             Big Cat                      Hemo

Leo                                                 Saplen

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Variation

  • Variation is the differences in characteristics.
  • Variation exists between animals of the same species and between different species.
  • Variation is essential for evolution.

There are 2 types of variation:

  • Continuous Variation- A feature that can be measured and given a value from a range of values.
  • Discontinuous Variation- A feature that cannot be measured but is one of a few distinct options.
  • 
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Evolution

Evolution is the gradual change in a species features in order to adapt to change in the environment. Sometimes the change is so dramatic that a new species is formed. This is called Speciation.

The changes in the environment is called Selection Pressure.

Darwin came up with the theory of evolution by natural selection- two scientists inspired his theory:

  • Lyell, a geologist demonstrated that the earth is a lot older than the bible suggested.
  • Mattheus, an economist showed that the more children a family had, the more chance it had of starving.
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Genes

Characteristics are passed down through the mother and the father to the children through genes, 23 Chromosones come from the mum and 23 come from the dad.

Gene- A section of Chromosone which codes a specific characteristic and a section of DNA that makes a protein.

Chromosones- Long strands of DNA.

DNA- The molecule that genes are made of.

Protein- Type of molecule that genes code for.

Bases- Chemicals in DNA that carry the genetic code.

Amino acid- The small molecules that join to make proteins.

Allele- A version of a gene.

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Genes and Genetic Disorders

Hetrozygous- More than one allele.

Most diseases are caused by a combination of environment and inherited risk alleles. A few diseases are caused by the inheritance of faulty diseased alleles.

Recessive- Dominant- only need to inherit one faulty copy.

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