Earth Science c/o plant cycles and lichen

Question

1.  a lichen is an example of

    

 a.  symbiosis

b.  mutualism

c.  parasitism

 

2.  lichens are found in areas

 

a.  undergoing primary succession

b.  undergoing secondary succession

c.  climax communities

 

3.  in an area undergong primary succession perennials are

 

a.  the first plants to appear

b.  present before primary sucession begins

c.  not part of this stage succession

 

4.  weeds growing in the cracks of a sidewalk would be an example of

 

a.  primary succession

b.  secondary succession

c.  climax communities

 

5.  climax communities tend to be

 

a.  stable

b.  unstable

c.  stable only in certain biomes

 

6.  compaired to climax communities areas undergoing primary succession tend to

 

a.  have the same amount of diversity

b.  be more ecologically diverse

c.  be less diverse

 

7.  secondary succession proceeds

 

a.  more quickly than primary succession

b.  more slowly than primary sucession

c.  at the same rate as primary succession

Answer 1

Lichen is an example of symbiosis , a partnership with fungus and photosynthetic phycobiont or photobiont. They are found in the area undergoing primary succession and are the first living organisms to appear.

 

Perennials are not the part of primary succession.

 

Weeds growing in cracks can be the example of secondary succession.

 

Climax communities are stable, comparatively areas undergoing primary succession are much less diverse.

 

Secondary succession might have the same rate as primary succession or could be faster depending on the climate and other factors.

 

I hope this helps.