What is cephalization?

return to the earlier evolutionary form

changing colours as a camouflage

walking backwards

process that produces a head region

Cephalization is considered an evolutionary trend, whereby nervous tissue, over many generations, becomes concentrated toward one end of an organism. This process eventually produces a head region with sensory organs.

Ninjai

Iqbal Osman wikipedia → Cephalization

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How do baby birds get oxygen inside their eggs?

They have a large oxygen supply from the start

Oxygen is created during protein reduction

Oxygen comes in through pores in the shell

They don't need oxygen at all

Which dogs are known to eat fish?

Okavango river is famous for its biologically rich delta. What is the river's outlet?

Guinea Bay

Indian Ocean

Red Sea

It doesn't have an outlet to the sea

Which of those diseases is curable?