What data support the hypothesis that the origin of bilaterians, the deuterostome–protostome split, and the lophotrochozoan–ecdysozoan split all occurred long before the Cambrian explosion?

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

And give a detailed description! scientist observes the boundary between two tectonic plates for a decade and finds that no new volcanoes have formed over the course of her investigation. does this result support the theory of plate tectonics? why or why not?