Invertebrate Animals

Question 1

Porifera

Answer 1

Sponges are characterized by the possession of a feeding system unique among animals.

Question 2

Cnidaria

Answer 2

characterized by a radially symmetrical body with a saclike internal cavity and stinging nematocysts, and including the jellyfishes, hydras, sea anemones, and corals.

Question 3

Annelida

Answer 3

also known as the ringed worms or segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches

Question 4

Hydroid

Answer 4

a hydrozoan polyp as distinguished from a hydrozoan jellyfish.

Question 5

Jellyfish

Answer 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.

Question 6

Platyhelminthes

Answer 6

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

Question 7

Nematoda

Answer 7

having a tough outer cuticle. The group includes free-living forms and disease-causing parasites, such as the hookworm and filaria

Question 8

Pinworms

Answer 8

are small nematodes and are responsible for the intestinal infection in humans.

Question 9

Tapeworms

Answer 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. Supplement.

Question 10

Bivalvesis

Answer 10

is also called Pelecypoda, and was formerly called Lamellibranchia.

Question 11

Gastropods

Answer 11

comes from the Latin words gastro (stomach) and pod (foot).

Question 12

Coelomate

Answer 12

with a complete lining called peritoneum derived from mesoderm

Question 13

Acoelomate

Answer 13

characterized by bilateral symmetry and a digestive cavity that is the only internal cavity.

Question 14

Radial Symmetry

Answer 14

arrangement of parts of an organism around a single main axis, so that the organism can be divided into similar halves by any plane that contains the main axis. The body plans of echinoderms, ctenophores, cnidarians, and many sponges

Question 15

Asymmetry

Answer 15

Although the parts in a dividing plane or around an axis are not exactly the same, there is a significant correspondence in form, size, distribution, or arrangement of parts.

Question 16

Bilateral Symmetry

Answer 16

Symmetry in biology is the balanced distribution of duplicate body parts or shapes within the body of an organism. In nature and biology, symmetry is always approximate.

Question 17

Tentacle

Answer 17

narrow, flexible, unjointed part extending from the body of certain animals, such as an octopus, jellyfish, or sea anemone

Question 18

Cnidocyte

Answer 18

are used for prey capture and defense from predators.

Question 19

Ectoderm

Answer 19

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

Question 20

Endoderm

Answer 20

It emerges and originates from the outer layer of germ cells.

Question 21

Ovary

Answer 21

the female gonad or reproductive gland

Question 22

Teste

Answer 22

The male sex gland, located behind the penis in a pouch of skin called the scrotum.