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velikii [3]
3 years ago
7

Suppose a fox in a food web feeds only on rabbits, squirrels, mice and birds, all of which feed exclusively on plant material. A

ssuming that a fox’s daily caloric requirement is 800 kcal, and that only 10 percent of the energy at one trophic level can be passed to the next trophic level. How many square meters of plant material are required to support the fox, if the net primary productivity of the plant material is 8,000 kcal/m2/yr? Hint: draw the food chain to determine how many kcal/m2/yr the fox receives to determine how much land he needs and remember the 10% rule!
Advanced Placement (AP)
1 answer:
Illusion [34]3 years ago
7 0

Answer:

square metres of plant materials required to support the fox = 3650 m²

Explanation:

From the given information:

the daily caloric requirement of the fox = 800  

In a year, we have = 800 kcal × 365 /year = 292,000 kcal/year

Also, only 10% of the energy at a particular trophic level can be passed onto the next.

the net productivity of the plant material = 8000 kcal/m²/yr

So, using 10% of energy at a particular level, the fox only need 80 kcal/m²/yr

The objective is to determine in square meters, how many materials are required to support the fox.

square metres of plant materials required to support the fox = \dfrac{292,000}{80}

= 3650 m²

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2 years ago
Describe one change that resulted from the developments illustrated by Grotius’ passage.
Finger [1]

Answer:

Question-Specific Scoring Guide

• One point for describing one piece of evidence that would support the Figes passage’s characterization

of Russia’s political culture prior to the Bolshevik Revolution.

• One point for describing one piece of evidence that would support the Figes passage’s interpretation of

Russia’s “new autocracy” in the 1920s and 1930s.

• One point for describing one piece of evidence that would undermine the author’s argument in the

passage that the “new autocracy” in Russia resembled the old.

Scoring Notes

To meet the requirement of “describe” in parts (a), (b), and (c), the response must offer a minimally accurate

description of a piece of evidence and some indication of how it relates to the task of the prompt. Although it is

not necessary for an acceptable response to offer an explicit explanation of the relationship between the

evidence offered and the task of the prompt, it must go beyond a mere mention or name-dropping (e.g., “Russia

had a history of tyrants in the Romanov dynasty” or “then Stalin happened”).

Possible acceptable responses for part (a) (not exhaustive):

• Russia’s lack of experience with democratic institutions (though the extent to which the Duma,

established after 1905, was “democratic” may be debated) prior to 1917 meant that its people were illprepared for the overthrow of the tsar or the Bolshevik takeover.

• The politically repressive nature of the tsarist government prior to 1917 gave democratic institutions

little or no chance to develop prior to the Revolution.

• Russia’s relative lack of economic and educational development prior to 1917 meant that the Russian

population as a whole was politically inexperienced and unsophisticated.

• Radicalization of the anti-tsarist opposition prior to 1917 meant that many opponents of the tsar were

not interested in democratic reform.

• Russia’s leaders were oblivious to “public opinion,” especially concerning a potential withdrawal from

World War I.

• Russia lacked mass-based political movements, such as those that led many other European states into

war between 1914 and 1916.

• The extent of women’s political participation and electoral suffrage lagged even further behind

Western Europe.

Additional notes:

• Responses that do not connect Russia’s historical experience pre-1917 to political institutions or to

“democratic culture” specifically will not earn the point. For example, some responses claim that

feudalism persisted in Russia until the Bolshevik Revolution, and others mention serfdom as an

economic institution, without addressing the political aspects of the prompt. Merely alluding to a policy

of Ivan the Terrible, Peter the Great, Catherine the Great, Nicholas I, or any other tsar will not earn the

point, unless it is directly related to the thwarting of a “democratic culture” in Russia.

• Note that “prior to the Bolshevik Revolution” should be interpreted as any period in Russian history,

including the months immediately prior to the Revolution.

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3 years ago
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Answer:ytytyytytyt

Explanation:

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3 years ago
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