Deciduous trees are unique in the fact that they start to lose their leaves in Autumn. A hormone called auxin controls the process. As light levels and temperatures drop, auxin signals it is almost
winter. Which statement BEST describes why it is more advantages for deciduous trees to lose
their leaves in the colder months?
A. So that the snow will not stick to their branches and break them off.
B. So that they can have room for more animals to use their trunks for hibernation.
C. To help with reducing water lost and nutrient lost.
D. So that their new leaves will be bigger, greener, and plentiful

Which beat describes the brain stem

Which of the following are not included as modern mammals that evolved during the eocene epoch? primates artiodactyls perissodactyls none of the above

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.