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1. Life on Earth was pretty simple for over 3 billion years.... then suddenly, around 530...

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Biology

1. Life on Earth was pretty simple for over 3 billion years....then suddenly, around 530 million years ago, a huge diversity ofanimal forms suddenly (~10 million years time) appear in the fossilrecord. What might have caused animal forms to appear form?

2. 20% of all animal species are beetles! New species of animalsare still being found, mostly invertebrates. How many species doscientists believe are out there?

Answer & Explanation Solved by verified expert
4.5 Ratings (787 Votes)
Ans 1 In the sudden phase of evolution it was seen that there was a leap from single cell simple organisms to multicellular animals For billions of years the single celled creatures dominated and the most likely the cells started organizing themselves into 3D structures where the single cells combined together They began to divide and grow Nearly 530 million years ago first traces of    See Answer
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