Expansion of plants on Earth

Expansion of plants on Earth
1. is not random.
2. is random
3. is sometimes random
What is a taxon?
1. it is mostly species, genus, family, etc..
2. rare plant species
3. a map showing the expansion of plants
The list of all plant species in a particular area forms:
1. flora
2. fauna
3. flora or fauna
Phytogeography deals with :
1. ranges
2. maps
3. groups of plants
The ranges of different taxa differ:
1. in size and shape
2. in size and type of plants
3. in size and areas
Hiatus is:
1. a territory, where a given taxon does not occur
2. a territory, where a given taxon occurs
3. a territory, where a given taxon occurs only rarely
According to shapes ranges are divided into:
1. continuous and discontinuous
2. concentrated and dispersed
3. large and small
Maps of the ranges are used as:
1. graphical expression of taxa
2. graphical expression of the territory
3. graphical expression of fauna on the territory
According to human activities the ranges are:
1. original and secondary
2. primary and original
3. derivative and secondary
The ranges can be classified by shape:
1. macroranges, mesoranges, microranges
2. macroranges and cosmopolitan ranges
3. mesoranges and cosmopolitan ranges