An animal without a body cavity is called
a. atypical
b. acentric
c. acoelomic
d. asymmetrical user: which of these sets of physical characteristics is used to classify animal groups?
a. body size
b. number of legs
c. body cavity type
d. method of reproduction

Embryonic stem cells are cells derived from an embryo. these cells can be used to create new tissues for patients suffering from certain illnesses and disorders. which statement best summarizes why the use of embryonic stem cells could be seen as unethical?

Imagine that certain laws of physics could be ignored and you were able to travel vast distances in moments. now imagine that you traveled to an earth-like planet located light-years away that is known to support life. think about what you’ve learned in this unit and make an argument for what you think would be the dominant type of life form on this planet. consider whether a notochord is required for an organism to manipulate its environment and become a dominant creature.

Cells destroy body cells infected by a virus or bacteria.