Zoology Relics of Human Evolution Vemeonasal organ. The vemeonasal organ is a little pit on each side of the septum that is lined with nonfunctioning chemoreceptors. It may have been used for pheromone-detecting ability. Extrinsic ear muscles. These three muscles most likely made it possible for prehominids to move their ears independently, in the manner of many mammals, such as rabbits and dogs. Many people can learn to wiggle their ears because of

Usually, in hotter climates that are nearer to the equator, spread will be more powerful and Malaria is spread throughout the year. The uppermost spread is initiated in Africa South of the Sahara and in fractions of Oceania such as Papua New Guinea. In less hot areas, spread will be less powerful and very cyclic. In many moderate regions, like Western Europe and the U.S. financial expansion and public

In truth, large sharks tend to hunt large blubbery prey with a much higher ratio of flesh-to-bone than human beings. That is apparently why many test bites on a human result in no further attack. In the last decade, a tourist industry has evolved in parts of the world with access to coral reefs and natural shark populations. Hand-feeding excursions allow divers, lead by more experienced professionals to encounter sharks

In Paleontology, however, these wing digits have been considered as digits 1, 2 and 3 based on phylogenetic assessment of the fossil lineage suggesting that birds have evolved from theropod ancestors that had lost the fourth and fifth digits. Critics of this theory have suggested that birds have evolved from some other ancestors that had lost the first and fifth digits. Studies of developing limbs of chicken, including a

LEECHES: Bloodsuckers, Life-And-Limb-Savers "Nothing works as well as leeches when we need to get blood out of a (body) part." Concannon). Blood clotting is a life-saving body process, but when it endangers life or prevents the resolution of a torn tissue, leeches can come in handy. They have shown their worth as natural blood thinners, painkillers and surgical scavengers with the anticoagulant and anesthetic properties of their saliva. These saliva components hold much

The authors explain that "Large-scale habitat loss and fragmentation…" that results from urban sprawl is a major cause of the lack of biodiversity within the insect species (Acharya, 1999, 27). Even the building of a new road, or street lights, in places where previously there were no roads or lights, what the authors call "undisturbed areas," has an impact on insect biodiversity, Acharya explains. Meanwhile, moths, which are known