The answer is 'Cambrian' explosion. This took place approximately 541 million years ago. 'Explosion' refers to the evolution of a large range of new major animal phyla. Scientists know this by the large number of diverse fossils from this period. Prior to this period, organisms were single-celled, but over the Cambrian Explosion, lasting about 80 million years, life forms diversified rapidly to resemble the life forms existing today.
Carbon Monoxide would have been mostly to effect the embryo as it targets the respiration system.
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The theory of Continental Dift
Answer:
Not all bats hibernate. Even though bears and bats are the two most well-known hibernators, not all bats spend their winter in caves. Some bat species like the spotted bat survive by migrating in search of food to warmer areas when it gets chilly.
Explanation:
the answer is d
