The spreading process of a primary tumor is called , and the dispersion of malignant cells to establish a secondary tumor is called .

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

Astudent reads the following text in a science book: scientific evidence tells us that the cause of earths four seasons is the tilt of earth as it revolves around the sound the student is instructed to illustrate this information in a science book. how will the student illustrate winter in the northern hemisphere? a.earths northern hemisphere will tilt away from the sun. b. earths northern hemisphere will tilt toward the sun. c.earths orbit will be farther away than from the sun d. earths southern hemisphere will tilt away from the sun.

What maintain homeostasis when a persons internal body temperature is 97.5°f