Winter squash is an excellent source of vitamin A, vitamin C, alpha-carotene and beta-carotene. It is also a very good source of thiamin, vitamin B6, potassium, magnesium, and manganese, and a good source of iron.
Spiders are, for the most part, such generalist feeders that they kill many useful insects as well as many pest species, however because pest species are by their nature more numerous than beneficial species they are still effective. They are of great value to the environment.
This introduction to the African contributions to science, technology and development begins with the dawn of civilization and the domestication of agriculture, which introduced crops that have long continued to be important in food production.ollective Volume The Slave Route Project, UNESCO 10 contribution of Africa in the evolution of the ancient world into the modern world. A focus on technological and agricultural innovations establishes that skills acquired in Africa could be transferred to the Americas and therefore could affect development.