Siamese cats have dark fur on their face, ears, legs and tail. on the core of their bodies they have lighter colored fur. the color of the fur is determined by an enzyme. on the cooler parts of the body the enzyme causes darker fur. on the warmer parts of the body the enzyme does not function.

which of the following best explains the relationship between temperature and this enzyme?

a) the enzyme functions best in high temperatures
b) the enzyme functions in a specific temperature range.
c) the enzyme is denatured in cold temperatures.
d) cool temperatures allow the enzyme to break down dark pigments.

Based on the results of this study, what questions remain unanswered? how can these questions guide future research

What is the difference between the conducting zone and the respiratory zone of the respiratory system? the conducting zone is a series of cavities and tubes that move air to the respiratory zone where gases exchange with the bloodstream. the conducting zone exchanges gases between the lungs and the alveoli and the respiratory zone is a series of cavities and tubes that move air to the conducting zone. the conducting zone moves oxygen into the cells and the respiratory zone takes carbon dioxide away from the cells. the conducting zone moves oxygen into the bloodstream and the respiratory zone takes carbon dioxide away from the bloodstream.

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.