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PolarNik [594]
4 years ago
10

What effect did the development of the first forests have on carbon dioxide in the atmosphere?

Biology
1 answer:
Sladkaya [172]4 years ago
8 0
It decreased the amount of carbon dioxide in the air and increased the amount of oxygen because plants go through photosynthesis and convert carbon dioxide to oxygen in the process. 
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Most dividing human cells take___________to complete a cell cycle.
sesenic [268]

Answer:

The answer is 7 years to complete a full cell cycle.

Explanation:

7 years.

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3 years ago
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Hydras and jellyfish both live in a freshwater lake that is slowly being acidified by the runoff from a chemical plant built ups
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Answer:

Jellyfish

Explanation:

  • The mode of reproduction that is used by hydra to produce offsprings is asexual whereas the jellyfish is capable of reproducing sexually.
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  • However, in case of sexual reproduction there is more variation and hence in case of a changing environment such as acidification of a lake by a runoff, there is a better chance of jellyfish to survive as it reproduced by sexual reproduction and thus has the ability to give rise to an offspring which will carry the trait to be more resistant.
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3 years ago
A student plans to analyze a protein sample that he suspects to be made of 4 subunits that are non-identical but similar in mole
Butoxors [25]

Answer:

Agarose gel electrophoresis is the most suitable method for this analysis.

Explanation:

SDS-PAGE, sodium dodecyl sulfate polyacrylamide gel electrophoresis, is a procedure used for visualizing and separating proteins according to their molecular weight. The use of sodium dodecyl sulfate and polyacrylamide gel eliminates most of the influence of the tertiary structure and charge, and proteins are separated solely based on polypeptide chain length. So, if the student suspects that the protein sample is conformed of 4 subunits similar in molecular weight, SDS PAGE will likely not separate them.

On the other hand, an agarose gel electrophoresis can separate proteins based on their size AND charge, so, if you suspect that the proteins are not identical but similar in size, the charge factor can be important to separate them in an experiment.

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Where can we find evidence of changes in conditions on earths surface
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Answer:

Rock Layers of Earths Crust

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3 years ago
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The statement given in the question is TRUE; the health status of the American population is poor in international comparison.

America is one of the richest country in the world, but it is not among the healthiest. Despite the increase in life expectancy in past decades, Americans still live shorter lives and experience more injuries and illnesses compare to other countries of the world.

The major health conditions in which the American fare badly compare to other wealthy countries of the world include: infant mortality, injuries and homicides, HIV and AIDS, drugs related mortality, obesity and diabetes, hearth diseases, sexually transmitted diseases, teenage pregnancy, chronic lung diseases and disability.

5 0
3 years ago
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