Passive transport is the movement of materials through the cell membrane without the use of energy.
Answer:
Wegener thought all the continents were once joined together in an "Urkontinent" before breaking up and drifting to their current positions. But geologists soundly denounced Wegener's theory of continental drift after he published the details in a 1915 book called "The Origin of Continents and Oceans." Part of the opposition was because Wegener didn't have a good model to explain how the continents moved apart.
Explanation:
An ectoderm gives rise to hair, skin, nails or hooves, and the lens of the eye.
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The flu is a viral disease.
Cholera is a bacterial disease in the small intestine.
Measles is a viral disease.
The common cold is a viral disease.
Cholera is the only bacterial disease in this list.
