Which type of fossil contains little or no organic material

Why is excretion necessary to maintain homeostasis?

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

Iguanas need to live in a habitat that is very warm, so the pet store warms their enclosures with "basking lights" which act as an artificial sun. describe how the three methods of thermal energy transfer may take place within the iguana's enclosure.