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ivann1987 [24]
3 years ago
5

Why is a small cell better than a big cell?

Biology
1 answer:
Gnom [1K]3 years ago
6 0
Cells<span> are </span>small<span> because the ratio of surface area to volume is the most efficient at their size. This is because when you have a lot of </span>small<span> objects </span>vs<span> a few </span>big<span> objects the surface area is much </span>larger<span> in relation to volume.</span>
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The reason why a mother with B blood type and A antibodies in her system can carry a full-term pregnancy is thanks to the placenta. The placenta is a shared organ between the mother and the baby. Its function is to protect the baby and produce the necessary exchanges of nutrients and wastes between the maternal blood and the baby's blood. As the two types of blood are separated, and they never get in contact during pregnancy, the immune system of the mother does not recognize the baby as a treat. The mother can have A antibodies in her plasma due to a previous pregnancy where during delivery, the two types of blood mixed, also it can be due to any contact with the A blood type. When the foreign blood enters the body, the immune system forms antibodies for it.

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