Explain why deep sea fish have either reduced or hypertrophied (enlarged) eyes.

very little light penetrates to great depths. Under these conditions, the visual analyzer must either be very sensitive, or it becomes unnecessary – then vision is compensated by other senses: smell, touch, etc.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.