What are living things?
It is believed that the first signs of life emerged 3500 million last few years in the ocean water. The first had a single-cell organisms without a nucleus. Unicellular later appeared that if they had the nucleus and cytoplasm. From these primitive life forms evolved all living beings. Today we can distinguish five kingdoms that group: the moneras, fungi, protists, plants and animals. The first are primitive organisms that lack nuclei, can be classified into bacteria and green algae. Protists, among which are the amoeba and paramecium also have a single cell, but with core, moving like animals, and sometimes have chlorophyll, like vegetables. The fungi, which thrive on substances produced by others, share characteristics of plant and animal kingdoms. The plants range from less complex organisms to higher plants and trees. And finally, the animal kingdom, from simple beings groups such as sponges and jellyfish, to the most complex, like the man.
What are the ancestors of man?
Mammals were perfecting their adaptation to the fear over time. Thus, bipedal hominids emerged that walked on two feet and are the ancestors of man.
An intermediate stage between the kingdom of the fungi and the plant is comprising the lichens, considered symbiotic associations between fungi and algae.
- How do you measure time?
- The calculation of the passage of time is based on the rotation
- physics/how-do-you-measure-time.htm
- When they built the Roman Coliseum?
- One of the largest amphitheaters of ancient Rome was the Coliseum. Its
- history/when-they-built-the-roman-coliseum.htm
- What is the by-pass
- The word by-pass is English and means bypass, diversion. This term is
- medicine/what-is-the-by-pass.htm
- Where is the palace of Versailles?
- The palace of Versailles is located in the southwest of Paris. Headquarters
- arts/where-is-the-palace-of-versailles.htm
- Who was Darwin?
- One of the greatest researchers of the nineteenth century was the English
- persons/who-was-darwin.htm