Sponges have no “true tissues.” what does this mean?
select one of the options below as your
a. they perform body functions by diffusion.
b. they have organs for specific functions.
c. similar cells do not cooperate together.

The picture below shows two galaxies. spiral galaxy and elliptical galaxy which of these statements best describes a similarity between the two galaxies? (2 points) both have elongated centers. both have centers shaped like bars. both change their shape from time to time. both are held together by gravitational forces.

Explain in your own words what caused pangea to separate and why we don't worry about earthquakes in florida.

Which of the following best explains the changes in biodiversity shown in the graph?