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.
Presynaptic and postsynaptic cells.
Cycle of phage that lyses the host cells
The dystrophin glycoprotein complex (DGC) in skeletal muscle cells
Motile sperm cells of algae and seedless plants.
Types of active transport into and out of cells.
An electron micrograph of a synapse between two nerve cells.