Marine Animals

3. is an organ that develops in the uterus during pregnancy
7. is an asexual mode of producing new organism
10. are milk-producing gland of female mammals
11. characterized by or formed with absorption of heat
12. the group of animals that have a spine
15. Eggs is a terrestrially adapted egg, characterized by a shell and extra-embryonic membranes
17. Symmetry as body symmetry where the body can be divided into two identical halves in only one plane
18. is a system of vessels in echinoderms containing a circulating watery fluid that is used especially for the movement of tentacles and tube feet
20. anything associated with or occurring on the bottom of a body of water
21. is an without a backbone

1. development of certain species of invertebrates, or it can refer to a growth in the tissues of organs
2. is any so-called cold-blooded animal—that is, any animal whose regulation of body temperature depends on external sources
4. is of two principal body types occurring in members of the invertebrate animal phylum Cnidaria
5. Symmetry is a symmetry in which the sides exhibit correspondence or regularity of parts around a central axis
6. is an internal skeleton that provides support and protection to the body's organs
8. has a disproportionate arrangement of parts; exhibiting no pattern
9. is the shedding of the exoskeleton (which is often called its shell)
13. is a gas-filled organ in the dorsal coelomic cavity of fish
14. is a strong, flexible connective tissue that protects your joints and bones
16. an organism (plant or animal) having both male and female reproductive organs
19. a hard covering that supports and protects the bodies of some types of animals