Needed on both questions asap! 20 points

1. Adaptive radiation

The adaptive radiation is an evolutionary process in which rapid diversification occurs from a single ancestral species. The reasons for such rapid diversification, thus development of new physical traits, can occur from multiple reasons, such as sudden climate change, change in the food sources, or extinction of other species. Most often it is a response where there are numerous niches in the food chain opened up and free for taking, so the organisms develop new traits quickly in order to take over those niches.

2. It is dated from about 605-600 million years ago

The first multi-cellular organisms have appeared around 600 million years ago, at least from what is known so far from the fossils and the evidence of activities left from the organisms. They were very simple organisms, and the closest we can compare to in the present are the bacteria. In order for these multi-cellular organisms to develop, around 2.9 billion years where needed, as the first single-cellular organisms appeared around 3.5 billion years ago.

its 42

i say its d?