Simple Invertebrate

Question 1

Porifera

Answer 1

an aquatic invertebrate animal of the phylum Porifera ; a sponge.

Question 2

Cnidaria

Answer 2

an aquatic invertebrate animal of the phylum Cnidaria, which comprises the coelenterates.

Question 3

Annelida

Answer 3

The annelids, also known as the ringed worms or segmented worms, are a large phylum, with over 17,000 extant species including ragworms, earthworms, and leeches.

Question 4

Hydroid

Answer 4

a coelenterate of an order that includes the hydras. They are distinguished by the dominance of the polyp phase.

Question 5

Jellyfish

Answer 5

a free-swimming marine coelenterate with a jellylike bell- or saucer-shaped body that is typically transparent and has stinging tentacles around the edge.
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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

a small nematode worm that is an internal parasite of vertebrates.

Question 9

Tapeworms

Answer 9

a parasitic flatworm, the adult of which lives in the intestine of humans and other vertebrates. It has a long ribbonlike body with many segments that can become independent, and a small head bearing hooks and suckers.

Question 10

Bivalves

Answer 10

an aquatic mollusk that has a compressed body enclosed within a hinged shell, such as oysters, clams, mussels, and scallops.

Question 11

Gastropod

Answer 11

a mollusk of the large class Gastropoda, such as a snail, slug, or whelk.

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

symmetry around a central axis, as in a starfish or a tulip flower.

Question 15

Bilateral Symmetry

Answer 15

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

Question 16

Tentacle

Answer 16

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 17

Cnidocyte

Answer 17

is an explosive cell containing one giant secretory organelle or cnida (plural cnidae) that defines the phylum Cnidaria

Question 18

Ectoderm

Answer 18

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 19

Endoderm

Answer 19

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 20

Ovary

Answer 20

a female reproductive organ in which ova or eggs are produced, present in humans and other vertebrates as a pair.

Question 21

Teste

Answer 21

The external, protective shell, covering or exoskeleton of certain organisms

Question 22

Asymmetry

Answer 22

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