All vertebrates have:
a.)radial symmetry.
b.)bilateral symmetry.
c.)an open circulatory system.
d.)an exoskeleton.

What must be true for natural selection to heppen

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.

What characteristic make legumes a good food source for food insecure populations