Soluzione del esercizio 3 di Performer B1, Vol. 2

Esercizi svolti per il libro Performer B1, Vol. 2

Soluzione

  1. It means ‘variety of life on Earth’ and it comes from the contraction of the term ‘biological diversity’.
  2. There are three.
  3. It is the amount of variation in genetic material within a species.
  4. It is all the different species, as well as the differences within and between different species.
  5. The broadest diversity is ecosystem diversity, because within each ecosystem there is a great deal of both genetic and species diversity.
  6. An example of genetic diversity is the variation in the genes that determine hair colour in humans. The different types of mammals in a forest is an example of species diversity. The variation in ecosystems, such as deserts, forests and oceans, could be an example of ecosystem diversity