What are ommatidia?

What are chiasmata? What is their significance?

What do you mean by ommatidia?

The structures which absorb light and isolates adjacent ommatidia are

The structures which absorb light and isolates adjacent ommatidia are

Which of the following have "ommatidia" as unit of eye

Structures called ommatidia are associated with which organ system of Periplaneta?

Structures called ommatidia are associated with which organ system of Periplaneta?

Arthropod eyes are called compound eyes because they are made up of repeating units, the ommatidia, each of which functions as a separate visual receptor. What is the difference between compound eyes and simple eyes? Why is mosaic vision with less resolution soon in cockroach?

What is hypothesis? What are variables?

What are annelids? What are their characters?