Hy was the broad-spectrum revolution a significant event in human evolution? Group of answer choices It brought about a new tool tradition based on flaked tools. It consisted of a massive fluorescence of colored cave paintings beginning about 70,000 B. P., which suggests the evolution of color vision and a truly human-style brain organization. It provided the environmental circumstances that selected for the evolution of "Mitochondrial Eve." It provided new environmental circumstances that made important sociocultural adaptations like the development of plant cultivation more likely. It led to the extinction of the Neandertals, who had survived until then by eating big-game animals.

It provided new environmental circumstances that made important sociocultural adaptations like the development of plant cultivation more likely.

Explanation:

The broad spectrum revolution is important from the evolutionary point of view and the shift of the human subsistence. This revolution was first explained by Kent.

Earlier the humans depend primarily on raw meat but after this revolution they chose plant as  their main raw material for food and started using hunting and eat cooked food. They start developing the social culture and starts the plant and animal domestication.

Thus, the correct answer is option (4).

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.