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In rock layers, jellyfish fossils are found lower than trilobite fossils, and trilobite fossils are found lower than ammonite fossils. What can be determined from this information?
They are structures which are similar due to common ancestry
gathering food
Modifications an organism acquires during its lifetime can be passed to its offspring
A rapid increase in extinction rates
There is a lack of genetic variation for selection to act upon
geographic isolation
Trilobites existed before jellyfish and ammonites.
They are distantly related, so their development is similar.
Why do a chicken embryo and a cow embryo look very similar even though the adults do not?
They are structures which are similar due to common ancestry
gathering food
Modifications an organism acquires during its lifetime can be passed to its offspring
A rapid increase in extinction rates
There is a lack of genetic variation for selection to act upon
geographic isolation
Trilobites existed before jellyfish and ammonites.
They are distantly related, so their development is similar.
Which of the following is not a part of Darwin's theory of natural selection?
They are structures which are similar due to common ancestry
gathering food
Modifications an organism acquires during its lifetime can be passed to its offspring
A rapid increase in extinction rates
There is a lack of genetic variation for selection to act upon
geographic isolation
Trilobites existed before jellyfish and ammonites.
They are distantly related, so their development is similar.
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 structures which are similar due to common ancestry
gathering food
Modifications an organism acquires during its lifetime can be passed to its offspring
A rapid increase in extinction rates
There is a lack of genetic variation for selection to act upon
geographic isolation
Trilobites existed before jellyfish and ammonites.
They are distantly related, so their development is similar.
The finches on the Galapagos island were similar in form except for variations of their beaks. Darwin observed that these variations were useful for
They are structures which are similar due to common ancestry
gathering food
Modifications an organism acquires during its lifetime can be passed to its offspring
A rapid increase in extinction rates
There is a lack of genetic variation for selection to act upon
geographic isolation
Trilobites existed before jellyfish and ammonites.
They are distantly related, so their development is similar.
A sudden major climatic change would most likely initially result in
They are structures which are similar due to common ancestry
gathering food
Modifications an organism acquires during its lifetime can be passed to its offspring
A rapid increase in extinction rates
There is a lack of genetic variation for selection to act upon
geographic isolation
Trilobites existed before jellyfish and ammonites.
They are distantly related, so their development is similar.
The wing of the bat and the fore-limb of the dog are said to be homologous structures. This indicates that
They are structures which are similar due to common ancestry
gathering food
Modifications an organism acquires during its lifetime can be passed to its offspring
A rapid increase in extinction rates
There is a lack of genetic variation for selection to act upon
geographic isolation
Trilobites existed before jellyfish and ammonites.
They are distantly related, so their development is similar.
A group of mice becomes separated by the formation of a river. Over time, the northern mice became smaller and whiter, while the southern mice became larger and browner. This is an example of
They are structures which are similar due to common ancestry
gathering food
Modifications an organism acquires during its lifetime can be passed to its offspring
A rapid increase in extinction rates
There is a lack of genetic variation for selection to act upon
geographic isolation
Trilobites existed before jellyfish and ammonites.
They are distantly related, so their development is similar.
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