2. Which explains a type of igneous rock? a. intrusive
b. extrusive
C. compacted
d. both intrusive and extrusive

This is a type pf behavior that animals are born with and them to survive

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated