Grub
Source: This question is taken from the Everyday Science
Inner planets (Mercury, Venus, Earth, and Mars)
Spawn
Outer planets (Jupiter and Saturn)
Tadpoles
Breakbone Fever
the Imbrium Basin
Cast iron
Black
Simple microscope
Hamstring
Phytology
Xenon
Leukocytes
The Frigid Zone
Chromosomes
Cocoon
Testa
Erythrocytes
Caterpillar
Chrysalis
Second cranial nerve
Riboflavin