How does carbon enter the atmosphere? What effect does it have on ...

[schs14]

How does carbon enter the atmosphere? What effect does it have on Earth? How does it cycle back for
  use in biological components? What will be an ideal response?

Question 2

What are Darwin's postulates of natural selection? What will be an ideal response?

[aloop]

Answer to Question 1

ANS:Answer
should include:
 Carbon enters the atmosphere though the respiration of all living things as carbon
dioxide. Volcanic eruptions and the burning of fossil fuels also send carbon back to into
the atmosphere.
 An increase of carbon dioxide into the atmosphere creates an increase in surface
temperatures. This is due to the greenhouse effect.
 Photosynthetic organisms capture sunlight to fix carbon dioxide into organic molecules
that can be used.
 When primary consumers eat producers, they are able to obtain and use some of the
converted carbon. It can be incorporated into an animal's body for growth. Some of the
carbon will be respired out or excreted by the organism.
 Dissolved organic carbon is excreted back into seawater. Then the whole cycle starts
over again.

Answer to Question 2

ANS:Answer
should include:
 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.

[schs14]

Excellent

[atrochim]

Thanks for the timely response, appreciate it