Answer: By us people breathing in oxygen and breathing out carbon dioxide.
Excretion is the only effective way invertebrates fight disease. Because they don't have an immune system working daily, invertebrates only have the capacity to excrete and cleanse their body of harmful materials.
A is false.
Respiration breaks down glucose and oxygen, not food.
Hope this helps.
Both DNA and RNA are made up of threee basic parts: phosphate groups, sugars, and nitrogenous bases. The main difference between DNA and RNA is that the nitrogenous base thymine (in DNA) is replaced with uracil (in RNA). The other three bases remain the same, adenine, guanine and cytosine. In DNA, adenine always pairs with thymine, but in RNA, adenine pairs with uracil.
Answer:
The level of specialization is given by the function.
The function of the organ makes the cell as it becomes mature, its more specific function becomes.
First, a stem cell differentiates itself into a hepatic or neuronal cell, thus generating that its functions are limited compared to the rest of the stem cells.
After this process, throughout the cell development and maturation of the organ, its cells become more specific in a single activity.
Explanation:
The differentiation of the stem cells is regulated by the genetic code, the migration of these during the embryonic stage of the mouse and the external stimulation that these stem cells perceive.
