The answer is B. Paleozoic
This era was the first era where insects, amphibians, and reptiles roamed the Earth.
Hope this helps!
Objects in our solar system are in a spinning motion because THE GRAVITATIONAL PULL OF THE SUN PUSHED OBJECTS INTO A SPINNING MOTION.
The reason why the planets orbit around the sun is because the gravity of the sun keeps them in their circular paths. The gravity is a fundamental part of the universe structure. The planets revolving around the sun traveled in a circular path because they have velocities that are perpendicular to the velocity of the sun.
Analyzing the proteins of the Racoons and lesser pandas, there will be huge similarities with minor modifications.
These species will be very closely related.
<h3><u>Explanation:</u></h3>
The evolutionary background of the species are mainly studied based on the similarities of the nucleotide sequences and proteins. While studying the Lesser pandas and Racoons, there was a huge similarities in then based on their structures, and on their protein composition. The nucleotide sequences also showed huge similarities which also points that they have developed from same ancestor. This is why they are very closely related with each other by means of evolution.
Electrons transport chains are redox reactions that transfer electrons from an electron donor to an electron accepter.The transfer of electrons is coupled to the translocation of protons across a membrane,producing a proton gradients.