Artificial Selection.
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Answer:
By the numbers, humans produce a lot of food—enough to provide every person on Earth 2,750 calories per day, exceeding almost all dietary recommendations.
There’s one glaring problem, however: Humans aren’t producing enough of the right food.
When researchers at the University of Guelph in Canada broke those calories down into different food groups, they found a shortage in production of the most important foods. In the long run, with the global population expected to balloon to about 10 billion people by mid-century, this could cause some serious problems.
Explanation:
Before assessing the two given cases, an assumption needs to be made about the digestion of the two types of food items, corn and beef. Let us assume that both get digested by expending same amount of energy by the human body. Let the amount of energy at producer level be an arbitrary X.
Case 1: Corn to human:
Since corn is at the producer level, it will have X amount of energy. The transfer of energy from corn to human will take place with a loss of 90% energy at the producer level. Hence the humans will receive 10% of X amount of energy.
Case 2: Corn to cow to human:
Since corn has X amount of energy, only 10% will pass to the next level, i.e. cow. So cow has 10% of X. Cow transfers only 10% of the energy that it has. Hence humans receive only 10% of 10% of X amount of energy.
It can be seen that humans receive more energy in case 1 than case 2. Hence we can say that it is more efficient for humans to feed on corn.
Answer:
Hey mate....
Explanation:
This is ur answer....
<h2>C) The nucleus is the site of protein assembly.</h2>
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Answer:
No, se debe a la capacidad de evolucion genetica que tengan los seres vivos frente a los cambios amientales.
Explanation:
Algunos animales frente a cambios ambientales buscan desarrollar mutaciones geneticas que le confieran una cualidad fenotipica que los beneficie en ese medio, es decir como por ejemplo: picos mas largos, plumajes de diferentes cualidades, patas o dedos mas cortos, etc.
Si esta modificacion genetica es capaz de transmitirse a travez de los progenitores de la especie entonces se puede deducir que la especie evoluciono, por ende tiene una adaptacion exitosa y no depende de sus celulas sino del codigo genetico que estas contengan y si son capaces de transmitir dichos genes para poder asi heredar otras generaciones las cualidades fenotipicas ideales.
