Ingles

INSTITUTO TECNOLÓGICO Y DE ESTUDIOS SUPERIORES DE MONTERREY.

Bacteria perform many important functions on earth. They serve as decomposers, agents of fermentation, and play an important role in our own digestive system. Also, bacteria are involved in many nutrient cycles such as the nitrogen cycle, which restores nitrate into the soil for plants.

Questions.

• Why did prokaryotic cells exist before eukaryotic cells ones?

Evidence supports the idea that eukaryotic cells are actually the descendents of separate prokaryotic cells that joined together in a symbiotic union.

• Which advantages do eukaryotic cells have above prokaryotic?

Prokaryotes are molecules surrounded by a membrane and cell wall containing unbound genetic material, and lacking organelles, other than ribosomes. Eukaryotes are more complex and structured.

• Which advantages do prokaryotic cells have above eukaryotic?

Prokaryotes are the most populous life on the planet, outnumbering every other form of life, combined, by many orders of magnitude. Without prokaryotes, no other life would exist.

Mention and explain 3 functions (real life) for bacteria.

1. Play an important role in our own digestive system.
2. Help with the fermentation.
3. They serve as decomposers.

Sources.

http://evolution.berkeley.edu/evolibrary/article/_0/endosymbiosis_03

http://hyperphysics.phy-astr.gsu.edu/hbase/biology/prokar.html

http://classroom.synonym.com/major-structural-advantage-eukaryotes-over-prokaryotes-14989.html

There are also properties of equality.

Reflexive.

All real number equals to itself.

Symmetric.

        The symmetric property of equality states that if it’s equal, it is preserved, regardless of the order in which the terms are written.

Transitive.

        This property is necessarily must have three elements, one if which is repeated in both equalities; The other two elements must be equal. It cannot state this with a triple equality, because that double equality does not exist.

Substitution.

        This property allows to substitutes quantities for each other into an expression as longs as those quantities are equal.

Additive.

        Allows adding the same number to both numbers to both members of the equality (positive or negative) and the equality will not be altered.

Multiplicative.

        Indicates that the entire equality can be multiplied by the same real number and it will not be altered.

Conclusion.

With the properties of the equality and the field ones, it is possible to perform operations in equalities, etc. It is recommended to not memorize them, just apply them and to know the difference in each one.

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