Answer:
B. Hominins evolved an opposable thumb that enabled hands to grasp objects.
Explanation:
Prehistoric hominids evolved opposable thumbs earlier than bipedal walking. The opposable thumbs have been critical during evolution because this position enables the digits to grasp and handle objects.
Answer:
Choice C. Sodium bicarbonate acted as a pH buffer in Solution 2.
Explanation:
Sodium carbonate is used as pH buffering agent. Buffering agent is a type of solution which contains weak base or acid which stabilize the solution when another strong acid or base is added to the solution. If acid is added, the weak base that is present in the solution reacts with it and when base is added, weak acid reacts with it.
Answer:
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Explanation:
To view three-dimensional objects and larger specimens, with a maximum magnification of 100x
