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7 Jan 2018

There is/are __ type(s) of extinction(s), __.

two / Darwinian and Mass
one / like when a meteor hit earth killing all the dinosaurs
one / caused by the inability to adapt to the environment

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Casey Durgan
Casey DurganLv2
7 Jan 2018
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Related questions

1. What prevailing views were directly challenged by the Principle of Uniformitarianism, first outlined by Charles Lyell in the Principles of Geology, which was published in 1830?

a. Earth is only a few thousand years old.

b. Species are fixed and unchanging.

c. Catastrophic events governed early Earth history and geologic processes operating in the past were fundamentally different from modern times.

d. A and C only

e. A, B and C

2.

Which of the following statements are consistent with both Lamarckian evolution and modern views of Darwinian evolution?

a. Use and disuse of body parts allows organisms to adapt to their environment

b. Characteristics acquired during the lifetime of an organism are transmitted to offspring.

c. Evolution is progressive and goal-oriented.

d. New species are the result of descent with modification.

e. Natural selection is a mechanism of evolutionary change.

3.

In the formula for determining a population’s genotype frequencies, the term 2pq is based on principles of Mendelian genetics, which demonstrate that

a. heterozygotes can be produced in two ways.

b. the population is doubling in number.

c. heterozygotes have two different alleles.

d. A and C only

e. A, B and C

There have been five major extinction events throughout the history of the earth. Some scientists claim that we are now living during the sixth extinction event caused primarily by human activity. Journalist Elizabeth Kolbert recently wrote a book called the “Six Extinction” that details some of the evidence. Refer to Readings and Resources for an article about her. Do you agree or disagree with this claim? In your discussion, give an example of one organism that is currently endangered or has gone extinct in the past 20 years.

There have been five major extinction events throughout the history of the earth. Some scientists claim that we are now living during the sixth extinction event caused primarily by human activity. Journalist Elizabeth Kolbert recently wrote a book called the “Six Extinction” that details some of the evidence. Refer to Readings and Resources for an article about her. Do you agree or disagree with this claim? In your discussion, give an example of one organism that is currently endangered or has gone extinct in the past 20 years.

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