Invertebrate

Question 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.

Answer 1

Porifera

Question 2

Invertebrate animals characterized by the specialized stinging structures in the tentacles surrounding the mouth; a coelenterate.

Answer 2

Cnidaria

Question 3

Worm like animals characterized by an elongated, cylindrical body divided into ringlike segments.

Answer 3

Annelida

Question 4

Noting or pertaining to that form of hydrozoan that is asexual and grows into branching colonies by budding.

Answer 4

Hydroid

Question 5

A free-swimming marine coelenterate that is the sexually reproducing form of a hydrozoan or scyphozoan and has a nearly transparent saucer-shaped body and extensible marginal tentacles studded with stinging cells.

Answer 5

Jellyfish

Question 6

are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates.

Answer 6

Platyhelminthes

Question 7

Are parasites on animals and humans and cause disease

Answer 7

Nematoda

Question 8

A small nematoid worm that inhabits the rectum of the human host.

Answer 8

Pinworms

Question 9

Any of the ribbon-like parasitic worms of the class Cestoda, characterized by possessing a scolex (head) with bothria that aid in attaching to their host, as well as a thin, long strobila body resembling a strip of tape or ribbon

Answer 9

Tapeworms

Question 10

Any of various mollusks of the class Bivalvia, having a shell consisting of two halves hinged together. Clams, oysters, scallops, and mussels

Answer 10

Bivalves

Question 11

typically have a well-defined head with two or four sensory tentacles with eyes, and a ventral foot

Answer 11

Gastropods

Question 12

Body cavity

Answer 12

Coelomate

Question 13

an invertebrate lacking a coelom

Answer 13

Acoelomate

Question 14

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

Answer 14

Radial Symmetry

Question 15

The lack or absence of symmetry

Answer 15

Asymmetry

Question 16

arrangement of an organism or part of an organism along a central axis, so that the organism or part can be divided into two equal halves.

Answer 16

Bilateral Symmetry

Question 17

A narrow, flexible, unjointed part extending from the body of certain animals

Answer 17

Tentacle

Question 18

is an explosive cell containing one giant secretory organelle or cnida

Answer 18

Cnidocyte

Question 19

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

Answer 19

Ectoderm

Question 20

The innermost of the primary germ layers of an animal embryo

Answer 20

Endoderm

Question 21

the female gonad or reproductive gland, in which the ova and the hormones that regulate female secondary sex characteristics develop

Answer 21

Ovary

Question 22

produce and store sperm and are also the body’s main source of male hormones, such as testosterone.

Answer 22

Teste