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lOMoARcPSD|4339232Botany 1502 PDF-2-1 - Exam paper/assignments answers
Extended Plant Ecology and Environmental Botany (University of South Africa)
, lOMoARcPSD|4339232
Botany 1502 Final Examination Preparation Questions
Multiple choice Questions from BOT1501
Plate tectonics ultimately helps to explain
A the creation of mountains and volcanoes
B continental drift
C changes in the ocean floor
D both A and B are correct
E A, B and C are correct
In the scientific name Capsicum annum, Capsicum is the ___ and annum
the___
Class, order
Genus, species epithet
Kingdom, phylum
Family, genus
None of the above
The ground tissue of the fundamental tissue system includes
A parenchyma
B collenchyma
C fibres
D A and B are correct
E all of the above are correct
Cellulose
A Is a major component of the cell walls of plants
B Is a type of alkaloid
C Is a raw material that is used in photosynthesis
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D Is composed of a chain of glucose molecules
E A and D are correct
Study unit Content to
study
Prokaryotes The Prokaryotic organisms comprise of two domains : the domain
classification Bacteria and the domain Archaea in this study unit we pay
1 of prokaryotic particular attention to the domain Bacteria
organisms
The Important characteristic :
characteristics
of Motility: Some cyanobacteria execute sliding movements
cyanobacteria (apart from passive upward and downward movements in the
water column by means of gas vacuoles). Others are
immobile.
Reproduction Discuss the different methods of reproduction found in
discuss the of cyanobacteria.
classification, cyanobacteria
morphology, Reproduction occurs only vegetatively and asexually by
reproduction means of cell division, fragmentation (the formation of
and biological hormogones) and a variety of spores (eg hormospores,
importance of exospores and endospores, akinetes and heterocysts). No
the sexual reproduction takes place.
cyanobacteria
Fragmentation Process whereby a piece
of a filament breaks off
and the fragments
continue to grow called a
hormogone.
Spore formation:
Hormospore Sometimes a hormogone
is surrounded by a thick,
resistant wall and then it
is known as a
hormospore. A
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hormospore can survive
unfavourable conditions.
Exospores and Exospores are abscised to
endospores the outside, while
endospores are formed in
the cell and are released
when the cell bursts open.
Akinetes During unfavourable
conditions a vegetative
cell enlarges and a thick,
resistant wall is formed
around the cell.
Nutritional reserves are
also stored in such cells.
Once more favourable
conditions return, the
akinete may germinate
and divide through
mitosis to form a new
filament.
Heterocysts Specialised cells that have
the primary function of
nitrogen fixation.
Although their primary
function is not survival
and reproduction, they
can survive unfavourable
conditions for a limited
period of time because of
the presence of the thick,
resistant cell wall.
Because they do not have
food reserves, they cannot
survive as long as
akinetes. Once favourable
conditions return,
heterocysts can also
germinate and divide
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