B. speed up the reuptake of dopamine and norepinephrine
At the West African Institute for Trypanosomiasis Research Field Station at Ugbobigha was 21·5 per cent.; this species is believed to be of major economic importance because its presence must prevent the keeping of cattle in large areas of potential grazing.
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Trypanosomiasis, both of humans and of livestock, is one of the most important factors restricting economic development in Africa today. The present paper outlines how this disease is limiting agricultural, veterinary and forestry development in the Sudan, Bechuanaland and West Africa.
The present tsetse-fly distribution is reviewed. Glossina palpalis and G. morsitans occur in the south Sudan and G. morsitans in the Ngamiland district of Bechuanaland; G. morsitans, G. palpalis and G. tachinoides are the most important species in West Africa.
These tsetse flies have altered the cattle distribution in all three regions and, in addition to causing widespread disease, have created local overstocking problems in the tsetse-free grazing areas, and have enforced nomadism on breeding herds and economic loss in slaughter cattle along the trade cattle routes in West Africa.
Human trypanosomiasis is not now such an urgent problem and public health measures have led to its control in all three areas.
Increased agricultural development, which can be a successful and economic method of reclaiming land from tsetse flies, must be intensified in all three areas.
Forest conservation policy comes into conflict with tsetse control measures only in West Africa.
Detailed tsetse-fly surveys and research, on which future plans can be firmly based, are now urgently required.
Basically, a droplet of water falls, freezes, and is blown back up over and over and over again without hitting the ground. Each time it keeps accumulating more water droplets that keep freezing to the growing hail stone. That's how all hail is formed. When the hail stone is too big for the winds to keep blowing it back up again, it falls. The stronger the updrafts, the bigger the hail will get before falling to the ground. That's why it takes a pretty powerful storm to make a big hail stone -- the winds have to be strong enough to blow an almost baseball-sized piece of ice back upward again for it to keep growing.
-Properties that can be observed without changing the identity of the object or substance
-Color, shape, size, density
Answer:
Plants
Explanation:
In animal cells the division of cytoplasm is by constriction of the cell membrane. But in plant cells a cell plate forms within the cytoplasm and grows to separate the cell into two. The cell division in plants is completed by cytokinesis.
