A2 SNAB Biology 1 - Diversity (5.1 and 5.2)

Topic 5, chapters one and two of SNAB A2 Biology. Questions based on my revision powerpoint.

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  • Created on: 17-12-08 16:21
Why do we only have a very vague idea of the number of species on Earth?
Because of the sheer number of species is huge.
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How many species are there estimated to be?
5-30+ million
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Why are multiple access keys more flexible than dichotomous keys?
You can start with any characteristic and work through it in any order.
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How many species have bee named so far?
1.4-1.7 million
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Biodiversity is a term used to refer to:
All three.
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The term species refers to a group of organisms which have...
similar morphology, physiology and behaviour.
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The fact that horses and donkeys breed to produce infertile young (mules) shows that...
they are related but not the same species.
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The binomial system is...
A unique two-part Latin name consisting of the genus then the species
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When using a dichotomous key, it can be difficult to continue if...
...a particular characteristic is missing due to damage/development.
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Other cards in this set

Card 2

Front

How many species are there estimated to be?

Back

5-30+ million

Card 3

Front

Why are multiple access keys more flexible than dichotomous keys?

Back

Preview of the front of card 3

Card 4

Front

How many species have bee named so far?

Back

Preview of the front of card 4

Card 5

Front

Biodiversity is a term used to refer to:

Back

Preview of the front of card 5
View more cards

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