What inside of a shell requires warmth to survive?
oysters abalone bullfrogs sand beads water embryos Echinoids
A B C D E F G H
Inside of the eggs, the embryos grow by shedding their inelastic shell or exoskeleton.
Embryos inside of a shell require warmth to survive.
What inside of a shell requires warmth to survive? (A) oysters (B) abalone (C) bullfrogs (D) sand (E) beads (F) water (G) embryos (H) Echinoids