The change in environments that may have occurred at the end of the paleozoic era may have been caused by
a. mass extinctions
c. plate tectonics
b. evolution of the dinosaurs
d. the beginning of an ice age

The correct answer is C. Plate tectonics.

The change of environment which might have occurred at the end of paleozoic era are caused by plate tectonics.

Tectonics plates is termed as scientific theory which describes large-scale motion where there is movement of seven large plates of larger number of small plates of lithosphere in earth.

The model of tectonic plates builds concept of continental drift. Lithosphere is the outermost shell which is found in planets and it is broken down into tectonic plates which are then composed of continental lithosphere and oceanic lithosphere.

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.