The ____ is the cluster of cells in the center of the zygote that will eventually develop into the baby.
a. Amnion
b. stem cell
c. germ disc
d. placenta
Question 2
Which statement concerning the timing of puberty in males and females is true?
a. The onset of menarche in females typically occurs a few years prior to the typical onset of spermarche in males.
b. The onset of menarche in females typically occurs a few years after to the typical onset of spermarche in males.
c. The onset of menarche in females typically occurs around the same time as the onset of spermarche in males.
d. The onset of menarche in females typically occurs almost a decade after the typical onset of spermarche in males.
The Pleiades, an open cluster of stars in the constellation of Taurus.
Role of CD23 on epithelial cells in the pathogenesis of food allergic disease.
Iron deficiency anemia blood cells.
Allogeneic stem cells
The watery interior of cells
Distribution of dystrophin in muscle cells. (a) In normal muscle cells, all the dystrophin is locate