Introduction to improvement in food resources.
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Answers
Answer:
A reservoir host most obviously is a long-term carrier organism of a given pathogen that doesn't exhibit the disease caused by the pathogen.
A vector is literally any agent that transfers the pathogen to another organism. If you think about it, a reservoir doesn't have to be a vector i.e. there's no route of transmission they participate in, but a vector can certainly be a reservoir, such as bats, who often act as a vector for the pathogens they house (think Rabies). On the flip side, ticks are common vectors for Lyme disease, but small rodents actually act as the reservoir for B. burgdorferi (
Explanation:
A reservoir host most obviously is a long-term carrier organism of a given pathogen that doesn't exhibit the disease caused by the pathogen.
A vector is literally any agent that transfers the pathogen to another organism. If you think about it, a reservoir doesn't have to be a vector i.e. there's no route of transmission they participate in, but a vector can certainly be a reservoir, such as bats, who often act as a vector for the pathogens they house (think Rabies). On the flip side, ticks are common vectors for Lyme disease, but small rodents actually act as the reservoir for B. burgdorferi
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Introduction: Improvement in Food Resources
For their existence, all living organisms essentially required food. Early human beings started hunting animals and collecting fruits, flowers and roots of forest plants to meet their food requirement. Food is required for growth, development and body repair. It also protects the body from diseases and provides energy for doing all life functions. For example, food supplies proteins, carbohydrates and fats, vitamins, minerals and water to our body.
Among all the living organisms, only green plants are autotrophs. In fact, green plants perform a basic metabolic activity, called photosynthesis. In photosynthesis by using the energy of sunlight, green plants combine carbon dioxide and water to produce carbohydrates. In contrast green plants, animals and human beings are heterotrophs. Since time immemorial, human beings have been doing farming in rearing animals to meet their food requirements.
Plants as food are gift of nature to humans and most animals. In fact, different parts of plants, such as root, steam, leaf, flower and fruit, are consumed by humans in the form of cereals, vegetables, spices and fruits. Animals produce milk, egg, meat, etc., which also supplement our food requirement.