Answer:. a. You never show any symptoms of disease and there is no sign of the pathogen in your body.
Explanation: To be infected of a disease is to be affected by a disease causing organism.
For an individual to be infected there will be a sign and or symptom of the infection in the body but it could either be supressed by medication,or show obviously effect in such individual or mild effect. Hence an exception is a) where there is no symptom is shown and no sign of pathogen in the body.
Answer:
I think it is false because the Earth has a very large population of people and animals and each and every one of them needs nutrients to survive so I think the statement is false
. Groups of specialized cells cooperate to form a tissue, such as a muscle.
.This requires that they take in nutrients, which they use to provide energy for the work that cells do and to make the materials that a cell or an organism needs. Specialized cells perform specialized functions in multicellular organisms.
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Answer:
Rachel Carson's seminal 1962 book, Silent Spring, told the real-life story of how bird populations across the country were suffering as a result of the widespread application of the synthetic pesticide DDT (dichlorodiphenyltrichloroethane), which was being used widely to control mosquitoes and others insects.
Answer:
Grasslands are areas where the vegetation is dominated by grasses (Poaceae); however, sedge (Cyperaceae) and rush (Juncaceae) families can also be found along with variable proportions of legumes, like clover, and other herbs. Grasslands occur naturally on all continents except Antarctica. Grasslands are found in most ecoregions of the Earth. For example, there are five terrestrial ecoregion classifications (subdivisions) of the temperate grasslands, savannas, and shrublands biome (ecosystem), which is one of eight terrestrial ecozones.
Explanation:
