Question ID - 11947 | SaraNextGen Top Answer
Which of the following is an evidence for Darwin’s theory of common descent?
a)
There are patterns in the fossil record that suggest that other species have diverged from a single ancestor species
b)
There are biogeographic patterns in the distribution of species, for instance, distinct bird species on an island tends to resemble one another, suggesting a common ancestor
c)
There are common stages in the early embryological development of organisms, representing several distinct vertebrate groups
d)
All of the above
Which of the following is an evidence for Darwin’s theory of common descent?
a)
There are patterns in the fossil record that suggest that other species have diverged from a single ancestor species
b)
There are biogeographic patterns in the distribution of species, for instance, distinct bird species on an island tends to resemble one another, suggesting a common ancestor
c)
There are common stages in the early embryological development of organisms, representing several distinct vertebrate groups
d)
All of the above
(d)
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Darwin’s theory of natural selection states that the species tend to overproduce due to limiting resources. This sets up competition or struggle for existence. Those most fit in that environment are likely to survive, passing those favourable genes on to the offspring. In time, a new species evolves from the accumulation of favourable genes.
Punctuated equilibrium is a theory that was formulated after Darwin’s theory and it states that the species remains relatively stable for long period of time and then, due to some natural catastrophe, change rapidly in a short period of time
Darwin’s evidence for evolution: Biogeographic distributions
(i) Environment cannot account for either similarity for dissimilarity, since similar environments can harbor entirely different species groups
(ii) Affinity (similarity) of groups on the same continent (or sea) is closer than between continents (or sea)
(iii) Geographical barriers usually divide these different groups, and there is a correlation between degree of difference and rate of migration of ability to disperse across the barriers
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