<span>D. That they variable is staying the same.
Hope this helps (:
-Payshence xoxo</span>
Answer:
Cro-Magnon is a common name that has been used to describe the first early modern humans of the European Upper Paleolithic. Current scientific literature prefers the term European early modern humans, to the term 'Cro-Magnon,' which has no formal taxonomic status, as it refers neither to a species or subspecies nor to an archaeological phase or culture. The earliest known remains of Cro-Magnon-like humans are radiocarbon dated to 43,000 years before present. Cro-Magnons were robustly built and powerful. The body was generally heavy and solid with a strong musculature. The forehead was fairly straight rather than sloping like in Neanderthals, and with only slight browridges. The face was short and wide. The chin was prominent. The brain capacity was about 1,600 cubic centimetres, larger than the average for modern humans. However, recent research suggests that the physical dimensions of so-called "Cro-Magnon" are not sufficiently different from modern humans to warrant a separate designation.
I how this helps and good luck
Explanation;
False.
This describes allopatric speciation.
During the process of cell division, spontaneous changes within the genome can arise, called mutations. These are errors occur when copies of the DNA within the cell are made; mutations may range from small changes called single nucleotide polymorphisms, to large scale deletions, and additions which span multiple genes.
These mutations form variants which become stable within a population, leading to the formation of separate, genetically distinct populations called species. New species arise through several evolutionary mechanisms such as:
- allopatric speciation- physical barriers to gene flow ; isolation of groups which evolve separately in their environments by accruing suitable traits, to become a new species
- peripatric speciation- similar to allopatric speciation, but one group is much smaller, making the unique traits more notable, or distinct
- parapatric speciation- subpopulations in a large geographic region evolve reproductive isolation by mating with those nearby, however they continue to undergo gene exchange along a common border region
- and sympatric speciation- absence of physical barriers which hinder gene flow; reproductive isolation arise through many forms of the same genes called polymorphisms
Learn more about mutations at brainly.com/question/4602376
Learn more about DNA and RNA at brainly.com/question/2416343?source=aid8411316
#LearnWithBrainly
75% do a punnet square if you don’t understand