Related Terms. Google Classroom is a free collaboration tool for teachers and students. Teachers can create an online classroom, invite students to the class then create and distribute assignments. Within the Google Classroom students and teachers can have conversations about the assignments and teachers can track the student's progress.
Zygote vs Embryo   - A zygote is the formation from the two gametes, the sex cells sperm and egg. (pronuclei). It forms in about 3 days. - An embryo has 3 main structura â¦ l parts, further developed (forms in the 2nd week after pregnancy).o the first thing that visibly happens to a zygote is that it divides by mitosis into two cells, then they divide to form a four-celled embryo, and so on. Eventually the ball of identical-looking cells hollows and acquires an axis, and differentiation begins. For more detail, see the links below.
Approximately four days after fertilization, the zygote has about 100 cells and is called a blastocyst. When the blastocyst reaches the uterine lining, it floats for about two days and finally implants itself in the uterine wall around six days after fertilization. This signals the beginning of pregnancy.