Please answer ASAP!! Which term refers to a fertilized egg after the cells have begun to differentiate?

A. Blastocyst

B. Fetus

C. Embryo

D. Zygote

The term used to describe a disease-causing microorganism isa. virus.b. infection.c. pathogen.d. microbe.e. bacterium.

Label the following as inner or outer planets; a) has 67 moons made mostly of hydrogen and helium b) has rings c)no moons, high volcanic activity d) known as the red planet, has 2 moons e) very thin atmosphere, moons or rings

How does the structure of dna hold the information needed to code for the many features of multicellular organisms?