Primates Powerpoint
11 important questions on Primates Powerpoint
Name some differences between humans vs chimpanzees (12 in total)
More orthognathy
Larger brain encephalisation
Smaller canine and incisor teeth
Canines look like incisors
Canines not sexually dimorphic
Reduction of supraorbital tori (eyebrow ridges)
Frontal lobe of brain lies over eyes
Skeleton less robust (gracile)
Longer period of childhood growth and dependency
Longer life
Increased reliance on culture and technology
Give 5 reasons why bipedalism may be adaptive
Allows to gather fruit from bushes and low trees
Frees hands for carrying things
More energy efficient than quadrupedalism
Not fast but better for endurance running
Which primates are bipedal
Knuckle-walkers: gorillas and chimps on land
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What is a tapetum lucidum
How does human hair differ from other primates
Advanced thermoregulation through sweat glands
Huge range of genetically determined skin colours
Give 3 possible reasons why human skin is relatively naked (fewer and thinner hairs)
Discouraging parasites
Made obsolete by clothing
What is variation like in humans + what are ethnic groups in a genetic sense
Ethnic groups: human subbpopulations with differences in allele frequency. (can distribute those alleles to other populations by interbreeding)
Which UV ray has more carcinogenic effect
(UVA is around 10-20% of carcinogenic dose contribution)
Describe the relation between vitamin D and UV-B (+ origin vitamin D + deficiency)
From keratinocytes + dermal fibroblasts
Dark-skinned people in areas with low sun exposure -> at risk for deficiency (rickets)
What is a vestigial tail
Very rare
hairy skin and connective tissue -> no bone/cartilage
What is special about the human frontal lobe compared to all other primates
The question on the page originate from the summary of the following study material:
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