Question

II.

Answer the following questions: 3X3= 9 Marks

1.

Describe the process of positive feedback mechanism.

3

2.

‘The Mesopotamian civilisation had a vast geographical diversity.’ Justify.

3

3.

Bring out the key features of replacement and continuity model in evolution​

Answer 1

Explanation:

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Answer 2

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1) Positive feedback is a process in which the end products of an action cause more of that action to occur in a feedback loop. This amplifies the original action. It is contrasted with negative feedback, which is when the end results of an action inhibit that action from continuing to occur.

Positive Feedback. Positive feedback mechanisms are rare. It amplifies changes rather than reversing them. The release of oxytocin from the posterior pituitary gland during labor is an example of positive feedback mechanism.

2) In the narrow sense, Mesopotamia is the area between the Euphrates and Tigris rivers, north or northwest of the bottleneck at Baghdad, in modern Iraq; it is Al-Jazīrah (“The Island”) of the Arabs. South of this lies Babylonia, named after the city of Babylon.

However, in the broader sense, the name Mesopotamia has come to be used for the area bounded on the northeast by the Zagros Mountains and on the southwest by the edge of the Arabian Plateau .

3) Regional continuity model belongs to human origin assets that is consider by modern Homo sapiens and developed from different regional populations.

The replacement continuity delivers partial theory and includes fact that these homo sapiens are migrated out Africa and into Europe and Asia.

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