Answer:
Black Angus, Red Angus, Holstein, Gelbvieh
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During photosynthesis, with the aid of light energy, plants produce food from carbon dioxide and water. The energy produced by the plants is first consumed by the plants to do the process and then consumed by the primary consumers to the secondary, third, until to the decomposers. There is an energy loss in the food chain as energy is used by the consumers for activities before they are consumed by another organisms
Answer:Animals have been used in the industrialized production of human vaccines since vaccine farms were established to harvest cowpox virus from calves in the late 1800s. From that point, and through the first half of the 20th Century, most vaccines would continue to be developed with the use of animals, either by growing pathogens in live animals or by using animal cells.
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