What are Darwin's postulates of natural selection?
· There are more offspring produced than will actually survive to reach a reproductive age.
· There is genetic variation in all organisms.
· Some traits enhance the chance of survival in an environment. These traits are considered to be favorable.
· Organisms with favorable traits in an environment are more likely to survive and produce offspring. Thus, they are more likely to pass these favorable traits down to the next generation.
· When a particular trait is passed down in large numbers due to natural selection in an environment, it is selected for. It contributes to the success of an organism.
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A force of 1 N accelerates a mass of 1 kg at the rate of 1 m/s2. The acceleration of a mass of 2 kg acted upon by a force of 2 N is
A) half as much. B) twice as much. C) the same. D) none of the above
By how much is global temperature predicted to rise over the next century?
What will be an ideal response?
Which of the following is the hair-like part of a nerve cell?
A) the axon B) a dendrite C) the synapse D) the vesicle
Describe three impacts industrialization and the development of agriculture have had on the Earth's ecosystems