What are the extreme traits?
What is the middle trait.
What trait(s) are being selected for?
What trait(s) are being selected against?
What type of natural selection in occurring?
What would happen to the sea slug population if this coral reef was overgrown by green algae that killed all the sea whips and brain coral?

What type of natural selection is occurring now

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.