The diversification of grasses has occurred mostly in the last 20 million years. Some scientists have argued that this can be explained by a decline in the concentration of carbon dioxide in the atmosphere.
Most of the Earth's surface is covered by grassland biomes, which currently account for up to one-third of net primary production on land. Grasses make up the majority of grassland biomass and plant populations, but other plant groups, especially the Daisy family, are usually as diverse as grasses.
A new landscape was created when grasslands emerged, and grazing mammals like horses, wombats, and capybaras were among the various life forms that co-evolved with this biome and benefited from the substrate that grasses supplied.
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No everythings better then the 60s
Answer: Build trust
Explanation:
Building trust in negotiations or business helps, it gives room for more business, even when you're already on a particular deal.
In this instance, giggling and squirming is a conditioned response (CR).
A CR is a learned automatic response that occurs when a neutral stimulus is repeatedly followed by an unconditioned stimulus, till the neutral stimulus by itself elicits a conditioned response. In this scenario, the CR is Grace whistling, the unconditioned stimulus is the tickling, and the response is Khaleel giggling and squirming. After the repeated pairing of Grace's whistling followed by tickling, Grace's whistling alone creates the conditioned response in Khaleel.
