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The wing of the bat and the fore-limb of the dog are said to be homologous structures. This indicates that
They are distantly related, so their development is similar.
New species can appear gradually through small changes in an ancestral species.
Modifications an organism acquires during its lifetime can be passed to its offspring
artificial selection
They are structures which are similar due to common ancestry
There is a lack of genetic variation for selection to act upon
They allow for automatic biogeographic isolation.
Marine mammals adapted to an environment similar to that of the fishes
Marine mammals have many structural characteristics in common with fishes. The explanation that evolutionary theory would give for this similarity is:
They are distantly related, so their development is similar.
New species can appear gradually through small changes in an ancestral species.
Modifications an organism acquires during its lifetime can be passed to its offspring
artificial selection
They are structures which are similar due to common ancestry
There is a lack of genetic variation for selection to act upon
They allow for automatic biogeographic isolation.
Marine mammals adapted to an environment similar to that of the fishes
The dog breeds we have today were developed through:
They are distantly related, so their development is similar.
New species can appear gradually through small changes in an ancestral species.
Modifications an organism acquires during its lifetime can be passed to its offspring
artificial selection
They are structures which are similar due to common ancestry
There is a lack of genetic variation for selection to act upon
They allow for automatic biogeographic isolation.
Marine mammals adapted to an environment similar to that of the fishes
Why do a chicken embryo and a cow embryo look very similar even though the adults do not?
They are distantly related, so their development is similar.
New species can appear gradually through small changes in an ancestral species.
Modifications an organism acquires during its lifetime can be passed to its offspring
artificial selection
They are structures which are similar due to common ancestry
There is a lack of genetic variation for selection to act upon
They allow for automatic biogeographic isolation.
Marine mammals adapted to an environment similar to that of the fishes
Which of the following is not a part of Darwin's theory of natural selection?
They are distantly related, so their development is similar.
New species can appear gradually through small changes in an ancestral species.
Modifications an organism acquires during its lifetime can be passed to its offspring
artificial selection
They are structures which are similar due to common ancestry
There is a lack of genetic variation for selection to act upon
They allow for automatic biogeographic isolation.
Marine mammals adapted to an environment similar to that of the fishes
What hypothesis did Darwin investigate by studying the breeding of pigeons with distinctive traits?
They are distantly related, so their development is similar.
New species can appear gradually through small changes in an ancestral species.
Modifications an organism acquires during its lifetime can be passed to its offspring
artificial selection
They are structures which are similar due to common ancestry
There is a lack of genetic variation for selection to act upon
They allow for automatic biogeographic isolation.
Marine mammals adapted to an environment similar to that of the fishes
The population of Florida panthers has been drastically reduced by the actions of man. Which of the following most likely threatens their ability to continue to evolve in response to the pressures of their environment?
They are distantly related, so their development is similar.
New species can appear gradually through small changes in an ancestral species.
Modifications an organism acquires during its lifetime can be passed to its offspring
artificial selection
They are structures which are similar due to common ancestry
There is a lack of genetic variation for selection to act upon
They allow for automatic biogeographic isolation.
Marine mammals adapted to an environment similar to that of the fishes
Darwin’s finches evolved on an island. What is the main reason that islands often provide good examples of evolution?
They are distantly related, so their development is similar.
New species can appear gradually through small changes in an ancestral species.
Modifications an organism acquires during its lifetime can be passed to its offspring
artificial selection
They are structures which are similar due to common ancestry
There is a lack of genetic variation for selection to act upon
They allow for automatic biogeographic isolation.
Marine mammals adapted to an environment similar to that of the fishes
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