Earth land masses united into one supercontinent near the end o which era

Which plains area lies in both the united states and canada? altiplano central canadian shield coastal plains great plains

Amylase becomes denatured at a temperature of 80°c. during an experiment to study the effect of varyingtemperature on enzyme activity, amylase’s reactivity with starch was measured at body temperature (37°c), andthen again at an increased temperature of 42°c. how would this increase in temperature affect the experiment

What abo controlling alleles could kim give her child