Simple Invertebrates

Question 1

an aquatic invertebrate animal of the phylum Porifera. Ex: a sponge.

Answer 1

Porifera

Question 2

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

Answer 2

Cnidaria

Question 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

Answer 3

Annelida

Question 4

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

Answer 4

Hydroid

Question 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.

Answer 5

Jellyfish

Question 6

a phylum of worms having bilateral symmetry and a soft, usually flattened body, comprising the flatworms.

Answer 6

Platyhelminthes

Question 7

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

Answer 7

Nematoda

Question 8

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

Answer 8

Pinworms

Question 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.

Answer 9

Tapeworms

Question 10

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

Answer 10

Bivalves

Question 11

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

Answer 11

Gastropods

Question 12

have a body cavity called a coelom with a complete lining called peritoneum derived from mesoderm (one of the three primary tissue layers)

Answer 12

Coelomate

Question 13

an invertebrate lacking a coelom; especially :one belonging to the group comprising the flatworms and nemerteans (class Nemertea or Nemertinea) and characterized by bilateral symmetry and a digestive cavity that is the only internal cavity.

Answer 13

Acoelomate

Question 14

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

Answer 14

Radial Symmetry

Question 15

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

Answer 15

Asymmetry

Question 16

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

Answer 16

Bilateral Symmetry

Question 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.

Answer 17

Tentacle

Question 18

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

Answer 18

Cnidocyte

Question 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.

Answer 19

Ectoderm

Question 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.

Answer 20

Endoderm

Question 21

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

Answer 21

Ovary

Question 22

the witnessing or concluding clause of an instrument

Answer 22

Teste