The two ions are SODIUM AND CALCIUM IONS. Polarization refers to loss of polarization, that is, loss of the difference in charge between the inside and the outside of the plasma membrane of a muscle due to a change in permeability and migration of ion. When a heart muscle is depolarize, sodium ion and calcium ion channels open and they migrate into the cell from the outside.
I would go with A because its the only one that makes since. The pencil would have to fall eventually, and out of process of elimination I'd go with A .
Hope this helps ...
Answer:
The correct answer is C: l<em>oss of chloroplasts.</em>
Explanation:
The parasite would lose chloroplasts. As they absorb nutrients from the fish digest food in the gut of the animal, parasites do not need to photosynthesize any more. There are some parasites in the fishes digestive tract that conserve their motile capacity by keeping their flagellum or cilium. Some species get their membranes thicker for protection in their interaction with the host, and they can also secrete a special capsule. In general, these organisms reproduce asexually.
Search this on youtube : <span>Photosynthesis Equation Song - Biology Lesson
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haha this might help.