Which of the following arising out of mass extinction serves as an advantage to nature?
new genes are added to the gene pool of extinct species.
new, more adaptable species flourish, replacing the extinct species.
new varieties of species similar to the extinct ones are added to nature.

New, more adaptable species flourish, replacing the extinct species.

Explanation:

Mass extinction can be defined as the when both a large amount animal and plant species become extinct or die due to factors such as natural causes, environmental changes , climate changes e.t.c.

Animal and plant species have the ability to adapt to changes in their environment or climate but if these changes occur in a manner that is quite fast, animals and plant species would not have the time to adapt. This causes them to become extinct.

One of the advantages of Mass extinction to nature is that the extinct species are replaced by new , adaptable species which tend to flourish very well in their environment.

the answer is z.

the human body has five levels of organization. level 1: cells. cells are the basic units of life and form the first level of organization. cells in the human body have specific functions. examples include nerve cells, blood cells, liver cells, and so on.

they have identical fossils of organisms that have evolved over time.

both have animal fossils preserved in them due to weathering and erosion.

they contain different fossils because life on earth has changed through time.

the fossils in them were formed on the surface of earth due to exposure to sunlight.