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Last updated at 09:54 BST, Tuesday, 04 May 2010

Secrets of the rainforest

Insect in Borneo

One of Borneo's many weird and wonderful insects

Callum and Kaz learn about some of the new discoveries from the rainforests of Borneo.

This week's question:
There are an estimated 10 million species on Earth. How many have so far been discovered?

a) 750,000
b) 1.7 million
c) 2.4 million

Listen out for the answer in the programme!

Listen to the programme

Secrets of the rainforest

Vocabulary from the programme

species

a group of living things, such as plants, animals and insects that share the same general features.

Example:
"We continue to discover new species every day. Remove the forests and you will also exterminate countless species." (BBC News)

biologically diverse habitats

areas where many different living things have their natural home

Example:
The rainforests are some of the most biologically diverse habitats on Earth.

an ecosystem

all the life forms in an area that exist together and depend on each other

Example:
When the balance of an ecosystem is changed - by the introduction of new elements or dramatic rises in one or more of them - the normal functioning of the ecosystem can be disrupted. (BBC Bloom)

creepy-crawlies

an informal expression for insects and spiders

Example:
A month in a small, ill-equipped hut in the middle of a rainforest with nothing but unfeasibly large creepy-crawlies for company? (BBC Cambridgeshire)

a bug

informal word for an insect

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