Depending on the number of fertilized eggs and when the zygote division occurs, there are different types of twins. For example, If the zygote is formed by the union of an ovule and a sperm that after fertilization is divided to create two embryos, they are born identical twins, these babies carry the same genetic information.
The SI system or metric system is the most commonly used system of measurement around and hence makes it more applicable around the world than the english SOM
<span>Populations of a short type of sunflower are identified as a new species under the conditions that </span>they are unable to breed with the sunflowers of the original population.
