invertebrate

Question 1

Porifera

Answer 1

are a basal animal clade as a sister of the diploblasts

Question 2

Cnidaria

Answer 2

a phylum of aquatic invertebrate animals that comprises the coelenterates.

Question 3

Annelida

Answer 3

a large phylum that comprises the segmented worms, which include earthworms, lugworms, and leeches.

Question 4

Hydra

Answer 4

a minute freshwater coelenterate with a tubular body and a ring of tentacles around the mouth.

Question 5

Jellyfish

Answer 5

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

Question 6

Platyhelminthes

Answer 6

a phylum of invertebrates that comprises the flatworms.

Question 7

Nematoda

Answer 7

a large phylum of worms with slender, unsegmented, cylindrical bodies, including the roundworms, threadworms, and eelworms. They are found abundantly in soil and water, and many are parasites.

Question 7

Pinworms

Answer 7

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

Question 8

Tapeworms

Answer 8

a parasitic flatworm, the adult of which lives in the intestines. It has a long ribbon-like body with many segments that can become independent, and a small head bearing hooks and suckers.

Question 9

Bivalves

Answer 9

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

Question 10

Gastropods

Answer 10

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

Question 11

Coelomate

Answer 11

is the main body cavity in many animals and is positioned inside the body to surround and contain the digestive tract and other organs

Question 11

Acoelomate

Answer 11

an invertebrate lacking a coelom

Question 12

Bilateral Symmetry

Answer 12

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

Question 13

Tentacle

Answer 13

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

Question 14

Medusa

Answer 14

a free-swimming sexual form of a coelenterate such as a jellyfish, typically having an umbrella-shaped body with stinging tentacles around the edge. In some species, medusae are a phase in the life cycle which alternates with a polypoid phase.

Question 14

Radial Symmetry

Answer 14

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

Question 15

Asymmetry

Answer 15

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

Question 16

Gizzard

Answer 16

a muscular stomach of some fish, insects, mollusks, and other invertebrates.

Question 17

Polyp

Answer 17

a projecting growth of tissue from a surface in the body, usually a mucous membrane

Question 18

Crop

Answer 18

a thin-walled, expanded portion of the alimentary tract

Question 19

Intestine

Answer 19

(in vertebrates) the lower part of the alimentary canal from the end of the stomach to the anus.

Question 20

Pharynx

Answer 20

the part of the alimentary canal immediately behind the mouth in invertebrates.

Question 21

Aortic arches

Answer 21

the section of the aorta between the ascending and descending aorta