Fungsi bagian ditunjukkan dengan huruf x adalah...
a. tempat peleburan sel telur dan sperma
b. menghasilkan sel telur
c. merangkup Sperma yang masuk dari penis
d. tempat perkembangan embrio menjadi janin

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of