Simple invertebrates

Question 1

Porifera

Answer 1

Sponges, the members of the phylum Porifera, are a basal Metazoa clade as a sister of the Diploblasts

Question 2

Cnidaria

Answer 2

Cnidaria is a phylum containing over 10,000 species of animals found exclusively in aquatic environments

Question 3

Annelida

Answer 3

the annelids, also known as the ringed worms or segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches

Question 4

Hydroid

Answer 4

Hydroidolina is a subclass of hydrozoans in the phylum Cnidaria. It contains the bulk of the paraphyletic “Hydroida” which were one of the main groupings of the class Hydrozoa in older classifications and were placed at order rank

Question 5

Jellyfish

Answer 5

Jellyfish or sea jellies are the informal common names given to the medusa-phase of certain gelatinous members of the subphylum Medusozoa

Question 6

Platyhelminthes

Answer 6

The flatworms, flat worms, Platyhelminthes, Plathelminthes, or platyhelminths are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates

Question 7

Nematoda

Answer 7

The nematodes or roundworms constitute the phylum Nematoda. They are a diverse animal phylum inhabiting a broad range of environments.

Question 8

Pinworms

Answer 8

The pinworm, also known as threadworm or seatworm, is a parasitic worm. It is a nematode and a common intestinal parasite or helminth, especially in humans.

Question 9

Tapeworms

Answer 9

Cestoda is a class of parasitic worms in the flatworm phylum. Most of the species—and the best-known—are those in the subclass Eucestoda; they are ribbonlike worms as adults, known as tapeworms.

Question 10

Bivalves

Answer 10

Bivalvia, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts.

Question 11

Gastropods

Answer 11

The gastropods, more commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca, called Gastropoda. This class includes snails and slugs of all species and sizes, from microscopic to Achatina achatina, the largest known land gastropod

Question 12

Coelomate

Answer 12

have a body cavity called a coelom with a complete lining called peritoneum derived from mesoderm

Question 13

Acoelomate

Answer 13

an invertebrate lacking a coelom especially : one belonging to the group comprising the flatworms and nemerteans

Question 14

Radial Symmetry

Answer 14

The organism that grows around a single point

Question 15

Asymmetry

Answer 15

lack of equality or equivalence between parts or aspects of something; lack of symmetry.

Question 16

Bilateral Symmetry

Answer 16

the property of being divisible into symmetrical halves on either side of a unique plane.

Question 17

Tentacle

Answer 17

a slender flexible limb or appendage in an animal, especially around the mouth of an invertebrate, used for grasping, moving about, or bearing sense organs.

Question 18

Cnidocyte

Answer 18

A cnidocyte is an explosive cell containing one giant secretory organelle or cnida that defines the phylum Cnidaria. Cnidae are used for prey capture and defense from predators

Question 19

Ectoderm

Answer 19

the outermost layer of cells or tissue of an embryo in early development, or the parts derived from this, which include the epidermis and nerve tissue.

Question 20

Endoderm

Answer 20

the innermost layer of cells or tissue of an embryo in early development, or the parts derived from this, which include the lining of the gut and associated structures.

Question 21

Ovary

Answer 21

a female reproductive organ

Question 22

Testes

Answer 22

he male sex gland