list one key similarity and one key difference between a vaccine and the pathogen it protects against

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

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.

Identify the examples in which sam interacts only with natural resources