Answer:
The correct answer is A.
Explanation:
If i were assigned the task of producing a cladogram (a diagram used by scientists to compare different species and the relationships between them) that represents the evolutionary relationship between the given species, as the shared derived trait for the cladogram i could use the presence of a jaw which all of the mentioned species possess.
Shark and Lizards do not have hair, give birth to live young does not apply to lizards and sharks as well which lay eggs, production of milk is also not present in any other than humans, gorillas and tigers.
I hope this answer helps.
The correct answer is - mass extinction.
The most dramatic extinction of large prehistoric mammals occurred when the ice age was ending. The climate suddenly changed dramatically, thus the environment changed very quickly in response. Also, there's indications that maybe a meteorite hit Greenland and caused dramatic changes in just few hours and days. The larger mammals were all very specialized animals, so even small changes in the environment are fatal for them, as seen in this case.
It is interesting though that only the megafauna died out, while the medium sized and smaller animals survived, largely because they are not very specialized but are much more opportunistic in their food choices. Some of the large mammals that died out in this period are the smilodon, homotherium, american lion, short-faced bear, mastodon, mammoth, American horses, American camels, giant sloth etc.
The cumulative biological wear and tear that results from responses to stress that seek to maintain body equilibrium is known as Allostatic Load. It is the cost of chronic exposure to elevated or fluctuating endocrine or neural responses resulting from chronic or repeated challenges that the individual experiences as stressful. It represents the physiological consequences of chronic exposure to fluctuating or heightened neural or neuroendocrine response that results from repeated or chronic stress. <span />