Which of these is NOT a characteristic of a good experiment?
A. It is uncontrolled.
B. It is systematic (well planned).
C. It answers a testable question.
D. It answers a well-defined question.

It is uncontrolled.

Option A.

Explanation:

An experiment is a technique done to help, disprove, or approve a theory. Investigations give knowledge into circumstances and logical results by showing what result happens when a specific factor is manipulated.

An experiment is a methodology intended to test a theory as a feature of the logical strategy. The two key factors in any examination are the free and ward factors. The free factor is controlled or changed to test its impacts on the needy variable.

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.

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