Diversity of light-detecting organs

Several analogous types of eyes have developed independently through convergent evolution.

Related extras

The reproduction and development of insects

Based on their life cycle, insects can be grouped into three categories: ametabolous,...


An extinct group of Cephalopoda, with solid external skeletons. They are excellent index...

The seahorse

The tiny predator of the oceans. Interestingly, the male seahorse carries the fertilized eggs in...

The life cycle of vertebrates

The life cycle of vertebrates starts with the production of the reproductive cells of an...

Blue whale

Marine mammals, the largest known animals to have ever existed.

Southern wood ant

An ant colony consist of a queen, male ants and workers.

European crayfish

A type of large freshwater crayfish widespread in Europe.

Common bottlenose dolphin

Bottlenose dolphins are sea mammals which use ultrasound for orientation.

Added to your cart.