The springtail is a very common small insect that lives in rotten logs, rich soil, and other humid places. Its cuticle is water repelling (hydrophobic) except for a strange organ, the collophore, on its ventral side. Because it lacks the excretory organs of other insects, the springtail has this organ in contact with the water (it is responsible for ion balance and secretion of wastes). If we examined the cell structure of this collophore, we would expect to find a high number of
a.nuclei
b.ribosomes
c.golgi bodies
d.lysosomes
e.centrioles
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centioles
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D, lysosomes
To determine the cell structure of the collophore in the springtail, we can consider its function and compare it to known cellular components.
The collophore in the springtail is responsible for ion balance and secretion of wastes. To perform these functions, it likely requires an active transport mechanism and the synthesis of various molecules. Based on this information, the answer would be b. ribosomes.
Ribosomes are responsible for protein synthesis, and since the collophore is active in ion balance and waste secretion, it would require the synthesis of specific proteins. Ribosomes play a crucial role in synthesizing proteins from mRNA, so we would expect to find a high number of ribosomes in the cell structure of the collophore.
Other options can be ruled out based on their specific functions and not being directly related to the collophore's role in ion balance and waste secretion:
a. Nuclei: Nuclei contain genetic material and control cellular activities, but they are not directly involved in ion balance or secretion of wastes. While there would likely be nuclei present in the cell, we cannot expect a high number specifically in the collophore.
c. Golgi bodies: Golgi bodies are involved in protein processing, sorting, and packaging, but their function is not directly related to ion balance or waste secretion.
d. Lysosomes: Lysosomes contain enzymes for degradation and recycling, but their primary role is not related to ion balance or waste secretion.
e. Centrioles: Centrioles play a role in cell division and organizing microtubules, but they are not directly involved in ion balance or waste secretion.
Therefore, the most appropriate choice is b. ribosomes.