Posted by: crisdiaz24 | March 4, 2009

BACK FROM THE DEAD?

Complete the following text with the right passive tense of the verbs in brackets.

BACK FROM THE DEAD?

SCIENTISTS CLOSER TO CLONING TASMANIAN TIGER

Around the world, hundreds if not thousands of species of animals _____________________ (threaten) with extinction… but the latest scientific developments could mean that one day even extinct animals ____________________ (bring back) to life using DNA technology. The last-known Tasmanian tiger died in a zoo in Hobart, Australia, in 1936. Fifty years later, the species ____________________ (declare) extinct. But in 1999, a research project into DNA cloning ____________________ (set up) at the Australian Museum in Sydney, and now, after three years work, high quality DNA ____________________ (extract) from a baby tiger which ____________________ (preserve) in a jar of alcohol since 1866. According to scientists, there is now a chance of the Tasmanian tiger ____________________ (resurrect) using techniques similar to those which ____________________ (use) to create cloned sheep in the 1990s. If undamaged DNA ____________________ (recover), it could ____________________ (insert) into the empty egg of a related living species, such as a Tasmanian Devil.

However, the technology for the final stage of cloning – where the Tasmanian Tiger’s DNA ____________________ (place) into a Tasmanian Devil host which _____________________ (strip) of its own genetic material – is still ____________________ (develop).

“It’s a very significant breakthrough,” said Professor Michael Archer, Professor of Zoology at the University of New South Wales. “Although there’s still a lot of work ____________________ (do), there’s now a real possibility of Tasmanian tigers ____________________ (release) into the wild within the next decade.”

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Categories

%d bloggers like this: