Lecture 19 - New theories of human evolution Flashcards Preview

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Flashcards in Lecture 19 - New theories of human evolution Deck (9)
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1
Q

What was the traditional theory that made human special?

A

• Traditional theory is that we ate meat and meat contains more nutrients and calories – more nutrients can be absorbed and assimilated to fuel or big brains

2
Q

Why was the theory of meat eating not the reason why we got bigger brains?

A

But not true because meat eating goes way before humans developed big brains – bipedalism was developed first before big brains

Furthermore, there are other animals who are carnivorous (e.g. lions and tigers) – but these animals do not have big brains and are not intelligent like us

3
Q

Who came up with the “Cooking Ape Hypothesis” ?

A

Richard Wrangham

4
Q

What was the “Cooking Ape Hypothesis” about?

A

• His theory is that cooking is unique to humans (we learned how to use fire) - and that eating cooked food led to us having bigger brains

5
Q

What are the benefits of a diet of cooked food?

A

More calories as the cooked food is partially digested already, body do not need to spend so much energy to break it down further -> net gain in calories

More nutrients because it is easier to digest and absorb the nutrients in cooked food

6
Q

What are the disadvantages of a raw food diet?

A

Body needs more energy to digest the raw food than the energy present in the food -> net loss in nutrients/calories -> results in weight loss, malnutrition and in extreme cases – infertility!

7
Q

Is a diet of cooked food the cause of our big brains?

A

No. It is only the prerequisite for a bigger brain.

8
Q

What are the characteristics that shows that humans lived on a diet of cooked food?

A

Smaller molars and teeth

Absence of barrel chest

Smaller stomach

9
Q

When did humans become biologically adapted to a diet of cooked food?

A

somewhere around the time of homo erectus that the cooking revolution happened