The Surface of Some Parasitic Flatworms and Some Insect Tissues

question 41

Multiple Choice

The surface of some parasitic flatworms and some insect tissues is a "syncytium" or living layer that contains many nuclei and cell organelles but is not partitioned by plasma membranes.These tissues consume food,respire,and produce wastes.Since the cell theory states that "all living things are composed of cells" what is the best statement to accompany this question?

• A)These tissues are not living because they are not cellular
• B)These tissues are obviously a bridge between nonliving and primitive living cells
• C)The general concept of "life is cellular" still holds because these organisms still utilize cells sometime in their life,but this shows that plasma membrane partitions can be abandoned in some animals
• D)This proves that a "vital force" beyond cell chemistry gives life to substances

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