Invertebrates

Question 1

Porifera

Answer 1

a phylum of primitive invertebrate animals comprising the sponges and having a cellular grade of construction without true tissue or organ formation but with the body permeated by canals and chambers through which a current of water flows and passes in its course through one or more cavities lined with choanocytes

Question 2

Cnidaria

Answer 2

any invertebrate animal, as a hydra, jellyfish, sea anemone, or coral, considered as belonging to the phylum Cnidaria, characterized by the specialized stinging structures in the tentacles surrounding the mouth; a coelenterate.

Question 3

Annelida

Answer 3

any segmented worm of the phylum Annelida, including the earthworms, leeches, and various marine forms.

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.

Question 6

Platyhelminthes

Answer 6

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

Question 7

Nematoda

Answer 7

class of worms, Modern Latin compound of nemat- “thread” (from Greek nema, genitive nematos “thread,” from stem of nein “to spin

Question 8

Pinworms

Answer 8

a small nematode worm, Enterobius vermicularis, infesting the intestine and migrating to the rectum and anus, especially in children.

Question 9

Tapeworms

Answer 9

any of various flat or tapelike worms of the class Cestoidea, lacking an alimentary canal, and parasitic when adult in the alimentary canal of humans and other vertebrates: the larval and adult stages are usually in different hosts.

Question 10

Bivalves

Answer 10

The Bivalvia, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, comprise a class of marine and freshwater molluscs

Question 11

coelomates

Answer 11

nimals or Coelomata (also known as eucoelomates — “true coelom”) have a fluid filled body cavity called a coelom /ˈsiːləm/ with a complete lining called peritoneum derived from mesoderm

Question 12

Acoelomate

Answer 12

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

Question 13

Radial Symmetry

Answer 13

The body plans of echinoderms, ctenophores, cnidarians, and many sponges and sea anemones show

Question 14

Bilateral Symmetry

Answer 14

s a characteristic of animals that are capable of moving freely through their environments.

Question 15

Tentacle

Answer 15

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 16

Cnidocyte

Answer 16

(also known as a cnidoblast or nematocyte) is an explosive cell containing one giant secretory organelle or cnida (plural cnidae) that defines the phylum Cnidaria

Question 17

Ectoderm

Answer 17

is one of the three primary germ layers in the very early embryo

Question 18

Ovary

Answer 18

female reproductive organ

Question 19

Teste

Answer 19

male reproductive organ

Question 20

Gastropods

Answer 20

Commonly known as snails and slugs are large taxonmic class

Question 21

asymmetry

Answer 21

lack of equality or equlivalence between parts

Question 22

Cephalopods

Answer 22

an active predatory mollusk of the large class Cephalopoda, such as an octopus or squid.