Question

QUESTION 19

1. You are also able to examine the full skeleton of this same early hominin and observe that it has a very narrow thumb metacarpal head. This observation suggests that:

   		e. This hominin was capable of speech
   		a. This hominin was capable of using tools
   		b. This hominin was not capable of using tools
   		d. This hominin was not bipdeal
   		c. This hominin was bipedal

2 points   

1. Tool-making allowed early hominins to shift from a leaf and fruit-based diet to a meat and tuber-based diet. This change:

   		a. Enabled the shift to a higher-calorie diet
   		b. Allowed hominins to spend less time chewing, leading to smaller teeth and jaws
   		c. Required hominins to spend more time chewing, leading to larger teeth and jaws
   		d. Both a and c
   		e. Both a and b

QUESTION 21

1. Bipedalism likely evolved in our ancestors because:

   		a. It allowed for more efficient foraging over large distances
   		b. It made birth easier
   		c. It helped with temperature regulation
   		d. Both a and b
   		e. Both a and c

QUESTION 22

1. The fastest rates of evolutionary change in wild populations have been observed:

   		d. In response to biological invasions
   		e. In response to climate change
   		c. In response to fishing
   		b. In response to parasites
   		a. In response to predators

Answer 1

Q. 19 The hominins had most of their fingers folded with thumb mostly immobile. The third and forth metacarpels were there to take the weight from knuckle walking. This indicates that the hominin was not bipedel, meaning they are walking on four limbs.i.e. Correct answer is (d)

Q.20 Meat and marrow are dence in calorie resources along with essential amino acids and micronutrients. Moreover tool making helped hominins to chop and slice meat and other food, and make them easy for consumption. Thus the energy required for chewing reduced and teeth started to grow small with evolution.

Correct answer is (e) i.e.both a and b are correct.

Q. 21. Bipedelism evolved because our ancestors required to save energy to travel larger distances for food. Moreover males were required to carry more food along with them so they started to make use of their front limbs as hands . Hence corrrect answer is (a)

Q.22. Some of the key human adaptations evolved in response to climate change or environmental instability. The other factors were sub factors of the effect of climate change.

Hence correct asnwer (e) in response to climate change.

Thankyou