According to Microsoft Encarta Encyclopedia ’98, between about 2.5 million and 3 million years ago, A. afarensis clearly evolved into A. africanus. A. africanus had a brain similar to that of its ancestor. However, although the size of the
They African Elephant is related to the Savanna Elephant, and the Forest Elephant. The African Elephant is similar to the Asian Elephant. One of the most distinct differences between the African Elephant and the Asian Elephant is that African Elephants have the big ears and Asian have smaller ears. An African Elephant only has four teeth in its mouth. They have four molars, but these are not like our molars, their molars can be up to the same size as a brick.
As specified by its name, the woolly mammoth had a dense coat of hair and its outer layer consisted of long, coarse guard hairs, while a dense layer of fine wool lay underneath. The ears of the woolly mammoth were also relatively small unlike that of its tropical descendants, due to the climate it lived in. As a result of its small ears the surface area of skin open to the elements was minimized. The tusks were significantly larger than those of modern elephants, sometimes exceeding 13.5 ft. in length. The Woolly Mammoth’s tusks were presumably a sexually selected characteristic: males who possessed longer and more impressive tusks were able to mate with more females.
First of all, there is a difference in the geography of elephants, which are the sources of ivory. There are two species of elephants in the world: Asian and African elephants. There are distinct differences between African and Asian elephants. While elephants in general are the largest animals that walk the Earth, African elephants are even larger than Asian elephants. There are two subspecies of African elephants- the Savanna (bush elephant) and the Forest elephant.
African Elephant The common name is the African Elephant, the scientific name is Loxodonta Africana, the phylum is Vertebrata, the class is Mammalia, the order is Proboscidea, and the family is Elephantidae. The Closest Relatives to the African Elephant are: the Asian Elephant, mammoths, primitive proboscidean (mastodons), sea cows, and hyraxes. Scientists believe that the African Elephant evolved from one of its closest relatives, the Sea Cow. The geographical location and range of the African elephant covers all of central and southern Africa. In Ethiopia there are isolated populations that exist around Lake Chad in Mali and Mauritania.
Have you ever visited a zoo when you were a child? Did you see any large land mammals called elephants? I believe most of you already know the physical appearance of a creature called elephant. However, do you know that elephants are classified into two different types, which are the African and the Asian types? Although the African and the Asian elephants come from the same family taxonomy, each of them shares some differences, such as, the physical characteristics, the living conditions, and the distribution areas.
It is clear that the evolutionary tree is far bushier that at first appeared. While the human lineage split from that of the African apes some 5-10 million years ago, this new evidence suggests possible new lines from which humans evolved. It shows a far greater diversification of human evolution prior to the emergence of the Homo genus. The newly discovered skull has a small ear hole, like those of chimpanzees. However, it shares other features of early hominids, such as a small brain.
The skull is similar a chimpanzee, except for the more humanlike teeth. The canine teeth are much smaller than those of modern apes, but larger and more pointed than those of humans. Their pelvis and leg bones resemble those of modern man, and they were bipedal. Their bones show that they were physically very strong. Females were significantly smaller than males.
II. Brain Evolution Humans and chimpanzees are biochemically (DNA) and therefore probably phylogenetically (evolution relationships), more alike than chimps and gorillas. But the brains of chimps and humans differ in size and anatomy more than gorillas and chimps. The brains of chimps and gorillas probably didn't go through many evolutionary innovations, because they generally resemble other ape and monkey brains. This implies that the human brain changed a lot after the human/chimp evolution.
(Siyabona Africa, 2014, stated) Adaptations: Limbs Skeleton An elephant has a large skull to use as a weapon when competing with other elephants over territory or for the female elephants to protect their young from intruder elephants. Skin and thermoregulation: Elephant are thicked skin on some areas of the body, this is known as pachyderms. Their skin is up to 1 inch thick in most areas but on some parts of the body such as the legs, the end of the trunk and back the skin is only between 2.5cm to 3 cm thick. The skin is very thin behind the ears, surrounding the eyes, abdomen, chest and shoulders. They have sparse hair which helps to cool the elephant’s temperature.