According to Charles Darwin, the ancestor of the dog is wolves, some species of jackals, and this is subject to many studies: analyzes of chromosomes, behavior, morphology, and
Because it is these plants that have many different adaptations to very different environmental conditions; they are found in almost every corner of the planet, and also have
From the crossing of parents of one phenotypic group, offspring with other phenotypes may appear in cases where the genotype of the parents is heterozygous.
Psilophytes – fossil plants that lived on Earth about 450 million years ago, gave rise to all other plants, since they were the first to begin to master
1) Increase in the number of unicellular algae 2) Accumulation of silt deposits 3) Decrease in oxygen content in water 4) Death of aquatic invertebrates 5) fish death