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Homo neanderthalensis successfully lived in the cold, harsh ice-age conditions of Europe until becoming extinct approximately 30 000 years ago. Adaptations which enabled them to survive for up to 400 000 years included:
• short and stocky bodies• large noses• cave dwelling • living in groups of 8 - 25 individuals, with females moving between different groups• each group was territorial with territories covering about 50 km2• hunting large herbivores• surviving on a diet of up to 90% meat, as shown by bone and faecal analysis• cutting up meat using stone tools, which were slightly different for each group.
The genome of H. neanderthalensis has been sequenced using nuclear DNA extracted from bones. This has allowed comparisons with the genome of modern H. sapiens. From the data it is believed that the two species shared a common ancestor, most likely H. heidelbergensis, 270 000 - 440 000 years ago. There are DNA sequences in H. sapiens that are known to vary between individuals by only a single base. Researchers analysed these DNA sequences from H. sapiens populations in Western Europe, Southern Africa, West Africa, China and Papua New Guinea and compared them with H. neanderthalensis. It was found that H. neanderthalensis and non-African H. sapiens populations had 4% of their DNA in common. These DNA sequences are unique to them, and not found in the H. sapiens from the African populations.
You have a neuron with a resting potential of -55 mV, EK of -70 mV, and ENa of 50 mV. You decide to voltage clamp the neuron. Now, draw the membrane current over time. What will th
At 1:00AM, Neuron A is at rest with membrane potential equal to -70 millivolts; it is producing no action potentials. The threshold for an action potential in neuron A is -55 mill
1. What are the examples of helobial endosperm
FAC E - It lies under the anterior part of cranium. It is composed of 14 bones. These includes 2 nasals, 2 maxillae, 2 palatine, 2 zygomatic, 2 lacrymals, 2 inferior
Phylogenetic considerations
Illustrates the vitreous expansion and contraction in the physio-chemical property? Vitreous Expansion and Contraction The positive charge in Na ions, NaCl molecule and
Genetic Defects in DNA repair and human disease: 1. Xeroderma pigmentosum is an inherited disease that is characterized by severe photosensitivity and a very high incidence of
A genetic trait which is considered to be harmful in the present day might prove to be beneficial in future. For example by removing the trait for sickle cell we may increase the s
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Wound breakdown With careful flap design and gentle tissue handling this is a rare complication. The healing which follows is by secondary intention and can be aided by chlorhe
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