Which of the statements is true? Dizygotic twins must be of the same gender, but monozygotic twins can be of different genders.
The tendency to produce monozygotic twins often runs in families and is influenced by genetic factors, whereas genetic factors seem to have no impact on the occurrence of dizygotic twins. Monozygotic twins develop from one egg fertilized by two sperm, whereas dizygotic twins develop from two eggs fertilized by one sperm. Dizygotic twins, on average, have 50% of their genes in common, whereas monozygotic twins have 100% of their genes in common. Dizygotic twins usually look more alike than do monozygotic twins.
Dizygotic twins are formed due to the fertilisation of two eggs by two sperms which get implanted in the uterus and develops two fetuses, that s why they have 50% of genes in common. whereas monozygotic twins form from a single fertilized egg that splits and so they have 100% of their genes in common.
The discovery of the process of fermentation dates back to 1860 when the French chemist Louis Pasteur performed a series of experiments that proved that glucose could be converted into alcohol only in the presence of fermenting bacteria and yeast.
His experiments involved measuring the multiplication of yeast and the rate of alcohol production. He found out that the fermentation rate and the reproduction of yeast were directly proportional. Alcohol was produced as long as the yeast remained alive.
Therefore, through experimentation, Louis Pasteur demonstrated that only microorganisms could ferment sugars into alcohol.
The correct option is POUNDING OF THE WAVES. The intertidal zone in the marine aquatic environment refers to the regions of the foreshore and the seabed, which is exposed to the air at low tide and is submerged at high tide. The living organisms living in this zone are adapted to cling to the rocks in order to avoid been washed away by the waves.
