Task 1. The words in the box all appear in the passage. Fill each blankwith one of them. There are more words than needed.

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
   Biodiversity      gulf      investigate      samples      tiny   
1. Some plants and animals are referred to as organisms because they are extremely small.
2. Thanks to modern technology, scientists have been able to the life of plants and animals that live under the sea.
3- A is a large area of sea that is partly surrounded by land.
4. is a term that refers to the existence of different kinds of animals and plants which make a balanced environment.
5. These scientists have collected different to analyse for their experiment.