To what extent has the presence of a true coelom in animals changed over the course of evolution?
the presence or absence of a true coelom appears not to have changed during the course of evolution.
the presence or absence of a true coelom appears to have changed exactly once during the course of evolution.
it is impossible to tell whether the presence or absence of a true coelom has changed during the course of evolution.
the presence or absence of a true coelom appears to have changed multiple times during the course of evolution.

Option D is the correct answer.

To what extent has the presence of a true coelom in animals changed over the course of evolution?  

A coelom is a body cavity that is formed from the mesoderm tissue.

Option D - The presence or absence of a true coelom appears to have changed multiple times during the course of evolution.

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.

regents of the university of california v. bakke, 438 u.s. 265 (1978), was a landmark decision by the supreme court of the united states. it upheld affirmative action, allowing race to be one of several factors in college admission policy.