Answer:
It is true that the protostome developmental sequence arose just once in evolutionary history.
Explanation:
During evolution the Bilateria had been into two major divisions. One was the protostomes and another was the deuterostomes. It is all categorized during the embryonic development.
It is differentiated by the formation of anus and mouth. The protostomes include the annelids, molluscs and arthropods. Studies reveal that Protostomes are derived from their prebilaterian ancestors.
The protostome developmental sequence has been aroused only once during evolution which lead to the evolution of more than thousands of new species. They then were subdivided into two major group, namely Lophotrochozoa and Ecdysozoa.
In July 1794 Robespierre was arrested and executed as were many of his fellow Jacobins, thereby ending the Reign of Terror, which was succeeded by the Thermidorian Reaction. Learn about the most famous political group of the French Revolution. ... Learn about the principal instrument used in the Reign of Terror.
Answer: C
Soda and Ammonia
Explanation:
Salt is a substance that contains a cation which is a metal ion or an ammonium ion and an anion derived from an acid.
Answer:
One result of the expansion of the railroad system was a decrease in the cost of products. Explanation: Railroads made it much easier to transport products longer distances, therefore decreasing the price that a consumer needed to pay in order to obtain the product.
Explanation:
