PLANTS :) Crossword

an organism that obtains food by eating other organisms or by absorbing their byproducts
an animal that does not have a backbone
an animal that has a backbone
a cavity that is filled with water and that has a support function
a hard, external, supporting structure that develops from the ectoderm
an internal skeleton made of bone and cartilage
a cavity that serves both digestive and circulatory purposes in some animals
the concentration of nerve tissue and sensory organs at the anterior end of an organism
a series of cell divisions that occur immediately after an egg is fertilized
the stage of an embryo before gastrulation
the transformation of the blastula into the gastula or the formation of the embryonic germ layers
an organism whose embryonic blastopore develops into the mouth
an animal whose mouth does not derive from the blastopore
a body cavity that contains the internal organs
the rod-shaped supporting axis found in the dorsal part of the embryos of all chordates
the type of egg that is produced by reptiles, birds, and egg-laying mammals and contains a large amount of yoke
a member of the extinct order of mammal like reptiles that likely gave rise to mammal