Malignant tumors are classified according to
a. how quickly they divide.
b. how quickly they spread.
c. the type of cells that give rise to them.
d. the type of cells they are most likely to spread to.

Greenthe fossil record is the history of life recorded byhuman observationgod.climatologists.remains of the past.

What is the farthest destination to date for a human spaceflight mission?

Match the following terms and definitions. 1. species that are adapted to live in equilibrium at carrying capacity population density 2. population growth that reaches equilibrium and carrying capacity population 3. death rate mortality 4. birth rate k-selected 5. a group of interacting individuals of the same species within the same geographic area natality 6. the number of organisms living in a particular area logistic growth