The Cambrian explosion was a period at the Pre-Cambrian boundary of the geologic time scale at 542 Ma. At this boundary, the fossil record shows that animals suddenly appeared in a dramatic radiation of life. A radiation is the relatively rapid development of new types of organisms that derive from a common ancestor. The Cambrian explosion is important because it marks the origination of all major animal groups called phyla.
The Haploid number is half (haploid cells are sex cells egg and sperm they have half as many chromosomes as the diploid cells which are normal cells ) of the chromosomes so that would be 12. To clarify that if a organism has 12 chromosomes and reproduce sexually it takes two
parents each contributing ether a egg or sperm each egg or sperm contains half of the genetic
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material
Your answer would be (6)
Hope this helps.
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the following is not a nucleotide is RNA
The terms include Agonist which are directly involved in movement.
fixator which eliminate unwanted movement, neutralizer which prevent unwanted movement,Antagonist which opposes the movement of a joint by producing torgue and Stabilizer which stabilizes the humeral head in the glenoid flossa.