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Questions and Answers
What is the function of eyes in living organisms?
What is the function of eyes in living organisms?
- To produce sound waves
- To provide vision and process visual detail (correct)
- To control blood circulation
- To regulate body temperature
What is the role of the optic nerve in the visual system?
What is the role of the optic nerve in the visual system?
- Regulate the intensity of light
- Convert light into electro-chemical impulses
- Focus light through lenses
- Transmit electrical signals to the brain (correct)
In what types of organisms are image-resolving eyes present?
In what types of organisms are image-resolving eyes present?
- Plants and fungi
- Invertebrates and vertebrates
- Bacteria and viruses
- Molluscs, chordates, and arthropods (correct)
What is the purpose of the diaphragm in the eye's optical system?
What is the purpose of the diaphragm in the eye's optical system?
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What percentage of animal species possess a complex optical system?
What percentage of animal species possess a complex optical system?
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Study Notes
Eyes in Living Organisms
- Eyes function to detect and respond to light, enabling organisms to perceive and interact with their environment.
The Optic Nerve
- The optic nerve transmits electrical signals from the eye to the brain, interpreting visual information and enabling the organism to perceive and understand its surroundings.
Types of Organisms with Image-Resolving Eyes
- Image-resolving eyes, capable of forming detailed images, are present in certain invertebrates (such as insects and octopuses) and most vertebrates (including humans).
The Diaphragm in the Eye's Optical System
- The diaphragm, also known as the iris, regulates the amount of light entering the eye by adjusting the size of the pupil, allowing the organism to adapt to changing light conditions.
Complex Optical Systems in Animal Species
- A complex optical system, including eyes, optic nerve, and brain, is present in approximately 95% of animal species, highlighting the importance of vision in the survival and adaptation of organisms.
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