5. Although the specimens of Au. Afarensis indicated that Lucy's jaw was rather unlike other hominins, having a more gorilla-like appearance, “Lucy's pelvis and leg bones clearly show that Au. Afarensis walked as erect as you and I”; also Lucy’s pelvic structure indicates bipedal posture; 6. One of the modern tool is the molecular evolution.
The disadvantages of the baby box were that the baby box facilitated mothers’ care of babies. Would you raise a baby using this? Why or why not? Personally no I wouldn’t use the baby box because it’s not safe in my opinion. I would like to have a physical connection with my baby, and also be there hand and foot when he/she needs me.
Why would decreased range of motion indicate a joint disorder rather than a skeletal disorder? The joints would become less movable which would cause for them to age a lot quicker as for the skeletal system, it wouldn’t damage anything. Joints are similar to rubber bands, the longer they sit there the hardest they get which causes them to break easily. 7. Why do you think sloths and bats are not susceptible to osteoarthritis?
(With resistance) Air: with resistance, syringe A can still be pushed a little towards syringe B. this is because particles in air are spread out; there are room in between to particles. That is why when syringe A is pressed down, the particles compressed together tightly causing the syringe to move a little before the particles were impacted too tightly for the syringe to move Water: water particles are different from gas particles. Water has very little compressibility. Particles in water are much more compacted together, therefore giving no space for them to compress more. This is the reason why with resistance, syringe A will not move as the particles in water are as tightly compressed together as they can get.
Placental mammals are a rather diverse group, with nearly 4000 described species, mostly rodents and bats (photos at left). The placental mammals include such diverse forms as whales, elephants, shrews, and armadillos. They are also some of the most familiar organisms to us, including pets such as dogs and cats, as well as many farm and work animals, such as sheep, cattle, and horses. And humans, of course, are also placental mammals. Placental mammals all bear live young, which are nourished before birth in the mother's uterus through a specialized embryonic organ attached to the uterus wall, the placenta.
Java man was the “missing link”, he proclaimed. All over the world, people started to hunt for traces of our distant ancestors. With every new fossil they found it became ever clearer that there was not just one “missing link” but a whole chain of them between apes and modern man. Comparison of the fossils that Dubois found on Java in the nineteenth century with other finds from Africa has revealed that what Dubois found was actually a Homo erectus. In 1972 Mary Leakey’s son, Richard, and Alan Walker were looking for fossils near Lake Turkana in Kenya.
are the most diverse group of vertebrates besides perciform fish.and heights of General description Using one of the above definitions, dinosaurs can be generally described as archosaurs with hind limbs held erect beneath the body. This posture is due to the development of a laterally facing recess in the pelvis and a corresponding inwardly facing distinct head on the femur. Paleontologists think that Eoraptor resembles the common ancestor of all dinosaurs; When dinosaurs appeared, they were not the dominant terrestrial animals. The terrestrial habitats were occupied by various types of archosauromorphs and therapsids, like cynodonts and rhynchosaurs. Their main competitors were the pseudosuchia, such as aetosaurs, ornithosuchids and rauisuchians, which were more successful than the dinosaurs.
What makes humans so distinct? Introduction When brainstorming the term human one the first associations that might come to one’s mind are walking, talking, creativity, reasoning and war. A more sophisticated definition taken from the dictionary suggests that within a biological system the human is considered eutherian and belongs to the family of primates. The modern human, also Homo sapiens, is the only remaining species of the genus Homo. When compared with other animals it is especially the complexity of the human brain, capable of language, problem-solving, introspection and abstract reasoning, as well as the upright posture that stand out.
To better understand our history of evolution we will have to go back three point two million years ago where one of the first species of upright walking apes or hominids were discovered. Lucy, a female Australopithecus afarencis is well known for being part of the earliest species of hominids and was discovered containing forty-seven out of two hundred six bones in a full skeleton. During Lucy’s time the Earth’s plates were shifting causing the environment and climate to change. The rift valleys were forming and the rain forests were dying. In this new environment they found it more efficient to move about on two legs.
The cheetah, also known as Acinonyx jubatus in the scientific world, is one of the most speedy, agile, and fiesty animals on land. It is the oldest feline out of the thirty seven different species of cats, originating over four million years ago. With the start of the last Ice Age, approximately 10,000 years ago, all the cheetah in North America, Europe, and most of those in Asia and Africa perished. Fossils have been discovered in what is now Nevada, Wyoming, and Texas. From those that did survive this epic Ice Age, and from evolution of closely related animals, descended the cheetah that we recognize today.