Biología, cells

CELL: the building blocks of the living organisms.
Structure cell: 
- Plasma membrane. (Lipids, proteins and carbohydrates). Is a very thin and stretchy cover that separates a cell from its environment.
- Cytoplasm. Is the substance contained inside the cells and in which the cell organelles are found. 
- Genetic material. Complex chemical substance that contains information (genetic information) to regulate cells function. 
There are two types of cells, depending on where DNA is located: prokaryotic

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4.EUKARYOTIC CELLS.-Originated after prokaryotic cells.-They are more complex and with some advantages over prokaryotic cells.-Cytoplasm with organelles:structures that performs different functions.-Genetic material is in the nucleus,where is protected and provides better stability for cells.-They have a cytoskeleton:a microscopic network of protein filaments and microtubules.Maintain the cell´s shape and internal organisation.Helps cells move. -ORGANELLES:are membranous structures found in the

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Levels of organization

Are the different degrees of complexity in which living matter is structured.

Subatomic level: protons, neutrons and electrons.

Atomic level:formed by atoms. (bioelements)

Molecular level: formed by molecules and macromolecules. (biomolecules)

Cellullar organelles: capable of performing complex biological functions.

Cellular level: formed by cells, capable of performing vital functions.

Multicellular level: tissues, organs and systems. Perform complex biological process.


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environmental issues

-Ecosystem: A dynamic complex of plant, animal and micro-organism communities
and their non-living environment interacting as a functional unit
•Ecosystem is also the network of interactions among the living and non-living
elements of the system.
•Research on these interactions networks showed the need to consider ecosystems
as a whole when studying nature
•The SCIENCE behind this studies is called ECOLOGY
•ECOLOGY is not a political option, neither is an etical approach to nature or social
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  1. Employee training are the planned efforts of organizations to help employees learn job-related knowledge and skills.
  1. Social learning theory is a learning theory that emphasizes the observational learning of behavior.
  1. Modeling is learning that occurs through the observation and imitation of the behavior of others.
  1. Cognitive theories of learning emphasize that humans are information processors.
  1. Transfer of training is a concept dealing with whether training is actually applied in the work
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This poem was written by Seamus Heaney, who was an Irish poet, playwright and translator. It belongs to a collection of 43 poems, in which he deals with the troubles in Northern Ireland, looking frequently to the past for images and symbols which are relevant to the violence and political unrest of the time. It is also a reflection on Irish identity in 1975. What is to be Irish and what is to be an Irish poet among the pressing forces of three powerful northern strains: the North as a general

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