The phylum with endoderm, mesoderm, and ectoderm is
a. cnidaria.
b. porifera.
c. platyhelminthes.
d. all of the above.

2points what is the term for a female reproductive cell? a. egg b. chromatid c. allele d. fertilization

Which is a function of the central nervous system

Select the correct answer from each drop-down menu the images show fossils of a modern bird and two extinct organisms (a tyrannosaurus rex and an archaeopteryx). based on the structure of the three organisms, it can be concluded that the archaeopteryx and bird have wings, while dinosaurs have limhe se it can be concluded that