What do we mean by a mass extinction?
A) the extinction of large animals, such as dinosaurs
B) the extinction of a large fraction of the world's plant and animal species in a relatively short period of time
C) an extinction caused by the impact of an asteroid or comet
D) the extinction of any species of plant or animal that has mass
Question 2
Nearly every aspect of astronomy is related in some way to the existence of gravity and to the motions which are responsible for a balance against gravity. How does this balance play a role for the miscellaneous objects of the solar system (i.e.
, the asteroids and comets)? How can some aspect of this be used as a tool to determine masses in the solar system?
Brain mass as a function of body mass in mammals.
Albatrosses brood young chicks until they are large enough to thermoregulate.
Aneurysm. Photograph of the aorta, the large blood vessel arising from the heart, with a large bulge
Lung cancer. Photograph of part of a lung removed after death. The yellow area is a large tumor and
Land mass looks like a synapse
Large Intestine Anatomy