Simple Invertebrate Vocabulary

Question 1

simplest and oldest of the multicelled animals, with fossils dating back to Precambrian times.

Answer 1

Porifera

Question 2

phylum of invertebrate animals comprising the sea anemones, corals, jellyfish, and hydroids.

Answer 2

Cnidaria

Question 3

These animals are found in marine, terrestrial, and freshwater habitats, but a presence of water or humidity is a critical factor for their survival, especially in terrestrial habitats

Answer 3

Annelida

Question 4

is a type of vascular cell that occurs in certain bryophytes. In some mosses such as members of the Polytrichaceae family, hydroids form the innermost layer of cells in the stem

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

Members of this phylum are soft, thin-bodied, leaf or ribbonlike worms, including the familiar planaria of ponds and streams, as well as the flukes and tapeworms parasitic in human and other animal bodies.

Answer 6

Platyhelminthes

Question 7

are an extremely diverse group and are common in most habitats. These aquatic worms are abundant in freshwater and marine ecosystems but also inhabit the moisture film around soil particles.

Answer 7

Nematoda

Question 8

are small parasites that can live in the colon and rectum. You get them when you swallow their eggs. The eggs hatch inside your intestines. While you sleep, the female

Answer 8

Pinworms

Question 9

Most of the species—and the best-known—are those in the subclass Eucestoda; they are ribbonlike worms as adults, known as tapeworms.

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

Answer 12

Coelomate

Question 13

an invertebrate lacking a coelom especially : one belonging to the group comprising the flatworms and nemerteans

Answer 13

Acoelomate

Question 14

round symmetry

Answer 14

Radial Symmetry

Question 15

butterfly summitry

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

is an explosive cell containing one giant secretory organelle or cnida

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

he witnessing or concluding clause of an instrument

Answer 22

Teste