There is no model visible, but the main theory as to how an asteroid/meteor impact would cause a mass extinction is that the force of the projectile landing onto the surface of the earth would launch so much debris and material into the atmosphere that it would block out most if not all light from the sun, leading to a inevitable food pyramid crash. As the producers die and become harder and harder to find, primary consumers decline which leads to the decline of secondary consumers, and so on until you reach the apex predators in the ecosystem(s). Hope this helped!
When an organism is well adapted to its environment, this means that the organism is easily able to:
- withstand the climate of its habitat/environment
- regulate its bodily temperature in aforementioned climate
- use its abilities (such as eyesight, a keen sense of smell, etc.) to find nourishment or hunt prey
- safely hide, camouflage into the environment, or ward off possible attackers
Good luck on your assignment, and I hope my answer suffices.
1.41×10⁷
because the decimal points move from 7 digits.