Browsing Botany by Title
Now showing items 252-261 of 261
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Ultrastructure of the germinating Welwitschia mirabilis seed.
(1975)The structure and chemical composition of quiescent Welwitschia mirabilis (Hooker fil.) seeds and resultant changes occurring during the first 7 days of germination were studied. Research was focussed on the megagametophyte ... -
Uptake of Cadmium and its effect on the physiology of the liverwort Dumortiera hirsuta (SW) Nees and the moss Atrichum androgynum (CM) Jaeg.
(1997)In this thesis, the uptake kinetics of Cd by the liverwort D. hirsuta and the moss A. androgynum were investigated. In preliminary experiments, the toxicity of Cd to the bryophytes was investigated by characterising the ... -
The use of a virtual world to address misconceptions held by students regarding photosynthesis and respiration.
(1998)In an effort to contribute to the improvement of Matric Biology education, a survey was conducted in 1996 and 1997 of Matric pupils and first year students at several tertiary institutions, in order to identify those topics ... -
The use of growth kinetics in the development of a predictive model for the growth of Eichhornia crassipes (Mart.) Solms in the field.
(1982)Abstract available in PDF file. -
User attitudes to conservation and management options for the Ongoye Forest Reserve, KwaZulu-Natal, South Africa.
(2005)Indigenous forest resources are valuable to communities situated around them as they provide many different resources for their livelihoods. South Africa has only 0.5% of indigenous forest cover and most forests are ... -
The validity of currently recognised sectional limits within Combretum Loefling, subgenus Combretum (Combretaceae) in Southern Africa.
(1990)Taxonomic confusion associated with Combretum Loefling, subgenus Combretum (Combretaceae) resulted in this investigation into the validity of sectional limits within the subgenus in southern Africa. Eight sections, together ... -
Vegetation and ant dynamics in the southern Karoo.
(1997)The aim of this thesis was to describe the structure and dynamics of ant and plant communities in the southern Karoo and to assess mechanisms of species coexistence in ant and plant communities. The role of species ... -
Vegetation change in Northern KwaZulu-Natal since the Anglo-Zulu war of 1879.
(2013)Historic photographs have been successfully used to compare landscape change over time. I used photographs taken of the grassland biome during and just after the Anglo-Zulu War (1879) in KwaZulu-Natal (South Africa), which ... -
Vitamin B-6 deficiency : biochemical and physiological changes with special emphasis on zinc status
(1999)Abstract available on PDF file.