Phaosome in Earthworm isa)Lensb)Pigmentc)Nephridiumd)HormoneCorrect answer is option 'A'. Can you explain this answer?

Question

Answer

Earthworm has phagosome('L'shaped lens)madw up of hyalin.

Answer

Phagosome is a vesicle formed around a particle by a phagocyte viaphagocytosis. phagocytes include macrophages, neutrophils, and dendritic cells A phagosome is formed by the fusion of the cell membrane around a microorganism,

Answer

Earthworm is small transparent L-shaped lens or phaosome, made up of a hyaline substance. The lens focuses the light from all directions on neurofibrils. All the neurofibrils converge to an afferent nerve fibre which leaves the cell at its base to join the central nervous system. Photoreceptors enable worms to judge the intensity and duration of light.

Answer

1

Answer

Phaosome in Earthworm is a Lens.

Explanation:
The phaosome in an earthworm is a specialized structure that acts as a lens. It is part of the earthworm's visual system and plays a crucial role in vision.

1. Structure of the Phaosome:
- The phaosome is a transparent, fluid-filled structure located in the head region of the earthworm.
- It is spherical in shape and has a convex lens-like structure.
- The phaosome is surrounded by pigmented cells that help to focus light onto the lens.

2. Function of the Phaosome:
- The main function of the phaosome is to focus light onto the sensory cells present in the earthworm's body.
- It acts as a lens by refracting (bending) light rays that enter the earthworm's body.
- The refracted light is then focused onto the sensory cells, allowing the earthworm to perceive its surroundings and respond accordingly.

3. Role in Earthworm's Vision:
- Earthworms have a simple visual system that enables them to detect light and shadow.
- The phaosome plays a crucial role in this visual system by helping the earthworm to detect changes in light intensity.
- It allows the earthworm to differentiate between light and dark areas in its environment, which is important for various activities such as burrowing, feeding, and avoiding predators.

4. Comparison to Other Options:
- The other options mentioned in the question are pigment, nephridium, and hormone.
- Pigment is a colored substance that absorbs or reflects light, but it does not have a lens-like structure like the phaosome.
- Nephridium is a excretory organ in earthworms, and hormone is a chemical messenger that regulates various physiological processes. Neither of these options is related to the earthworm's visual system.

In conclusion, the correct answer is option 'A' - Lens. The phaosome in an earthworm is a lens-like structure that plays a crucial role in its visual system by refracting and focusing light onto sensory cells.

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