Over millions of years, hominid species learned to use and create tools that became more complex over time. They eventually shaped stone into knives used for cutting, and they harnessed fire for light, heat, and cooking food. Which of the following best explains what effect this had on hominid evolution?
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
a. Hominid brain size decreased as life became easier with the advent of tools.
b. Hominid hands developed smaller thumbs as they developed finer tools.
c. Hominid tooth size decreased as they relied on cooked foods and tools for cutting.
d. Hominid front limbs became longer in proportion to the rest of their body.
i think its either b or d
Oh jeepers. I think it's C.
Because the tools were designed to suit the hands, I think it's unlikely that hands evolved to suit the tools. Also, I don't see why tool use would affect limb size.
But if the food were softer (from cooking) and the early humans could make it softer still by pounding it with rocks and cutting up with sticks (I assume, I really should not speculate about caveman cooking practices), it would remove the necessity for humans to have very big rugged teeth. They could get by with smaller ones instead and those genes eventually became widespread in the population...
Not the answer you are looking for? Search for more explanations.
oh so the less you use it, you loss it?
No, the less you need to use it, the less necessary it becomes.
Before tools, not being able to chew really tough food would put individuals at a competitive disadvantage. Small toothed individuals would be less able to eat so they wouldn't reproduce and pass on their small-toothed alleles so much - as a result, those alleles would not be common in the population.
But if that limiting factor wasn't a factor anymore (because now they can chop their food up before chewing it), they'd eat and compete and pass on their genes as well as the big toothed ones and those genes would gradually become more common.