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Arthropods (continued)

Crustaceans Most crustaceans are marine, meaning they live in the seas and oceans. Some species, however, have their habitat in freshwater, and still others are terrestrial, such as the Garden Peacock. We can cite as examples of better known crustaceans: Shrimp, lobster, crab, crab and barnacle. The size of these animals varies greatly from one species to another.
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A little of the history of Darwinism

Many of the observations that led Charles Darwin to elaborate his evolutionary theory occurred during his voyage around the world as a naturalist on the English ship H. S. Beagle. During the five-year voyage that began in 1831, Darwin visited various places in South America (including Brazil) and Australia, as well as several tropical archipelagos.
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Structural chromosomal aberrations

These changes do not modify the amount of chromosomes in a cell, but determine the appearance of abnormal chromosomes. The aberrations we describe below almost always lead to serious problems, including gamete formation. This is because during meiosis, the chromosome with the deficiency anomalously matches its unchanged counterpart, affecting the progress of the meiotic process.
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Glossary - Letter F

Phagocytosis - Process by which certain cells encompass relatively large particles with the aid of pseudopods. Phagosomes - Membrane bag that contains the particle captured by the phagocytosis process. Phanerogama - See sperm. Vegetative phase - Phase of life where the being does not have developmental or multiplication properties.
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Summary table of mixture separation methods

Homogeneous Mixtures METHOD PROCESS Simple Distillation (Solid + Liquid) On heating, only the liquid boils, vaporizes and then condenses, separating from solid. Fractional Distillation (Liquid + Liquid) By heating, the liquids vaporize. if and then they condense as their boiling points are reached Fractional Liquefaction (Gas + Gas) By cooling the mixture, the gases liquefy separately as their boiling points are reached.
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