Answer: Single celled eukaryotic organism
The theory of continental drift was given a scientific status during the:
1960's.
B. Tundra - only biome with snow
It is very true that masculinity and femininity are very strongly dependent on the society in which these terms are used. While there are genetic differences underlying the phenotype of being more masculine (having a bigger jaw, more hair on the body), there are also a lot of societal factors determining what is considered to be masculine and what feminine in a society.
The density of salt water is greater than the density of fresh water