How does the current, or sixth, mass extinction differ from the past five mass extinction events? the sixth mass extinction is believed to be caused by human-related factors. the sixth mass extinction is believed to be caused by natural forces. the sixth mass extinction is believed to affect relatively fewer species. the sixth mass extinction is believed to affect relatively fewer areas.

This current mass extinction is believed to be cause by human-related factors.

The 5th mass extinction was during the dinosaur era; which was demolished by the giant asteroid that hit Earth.

However, our 6th mass extinction (which makes me so sad); is cause by usthe human race. We're over hunting, over harvesting, taking away habitats that overall will also effect our ecosystem in a negative way.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.