What is a closed curculatory system

If a cell's main function is to produce proteins to be excreted, which organelles would you expect to be larger

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.

Select the word from the list that best fits the definition a system made of 25 satellites