From earliest times, man became aware of the importance of male and female in the generation of beings of the same species, and that characteristics such as height, skin color, etc., were transmitted from parents to descendants. Thus, of course, a dog when she crosses a dog will originate a puppy with characteristics of a dog and never a cat.

You already know how fascinating ants are - they are very strong, they live in complex colonies and they know how to work together. But there are some awesome facts you don't know about them yet. See below. Cute? Beware, they practice slavery 1. There are very large ants out there. Forgive us if you have insect phobia, but one type of African ant, the Dorylus wilverthi, measures about two inches.

The passages between the three physical states (solid, liquid and gaseous) are called physical state changes. Look at the following diagram and then read the explanations of each of these changes. Have you ever seen how on a hot day a piece of ice melts right out of the freezer? In this case, the solid state water quickly changes to the liquid state.

The plants perform photosynthesis by removing carbon from the environment of CO2 for formatting organic matter. The latter is oxidized by the cellular respiration process, which results in the release of CO2 into the environment. The decomposition and burning of fossil fuels (coal and oil) also releases CO 2 into the environment.

Parkinson's disease is a disorder of the central nervous system that primarily affects the motor system. It is one of the most common neurological conditions and its cause remains unknown. Available statistics show that the prevalence of Parkinson's disease in the population is 150 to 200 cases per 100.

Changes in the body The discovery of sex happens with the discovery of the body. Young men and boys often follow closely the changes that occur in their external sexual organs. These changes are caused by the action of hormones. Primary sexual characteristics, visible in the genitals, are genetically determined and present from birth in both men and women.