Miscellaneous Key Terms

Question 1

Amniote egg

Answer 1

The type of egg produced by reptiles, birds, and prototherian (egg-laying) mammals (amniotes), in which the embryo develops inside an amnion.

Question 2

Amniote

Answer 2

an animal whose embryo develops in an amnion and chorion and has an allantois; a mammal, bird, or reptile

Question 3

Amphibian

Answer 3

a cold-blooded vertebrate animal of a class that comprises the frogs, toads, newts, salamanders, and caecilians. 
They are distinguished by having an aquatic gill-breathing larval stage followed (typically) by a terrestrial lung-breathing adult stage.

Question 4

Brachiopods

Answer 4

A group of animals that have hard “valves” (shells) on the upper and lower surfaces, unlike the left and right arrangement in bivalve molluscs. Brachiopod valves are hinged at the rear end, while the front can be opened for feeding or closed for protection.

Question 5

Bryozoans

Answer 5

Aquatic invertebrate animals
filter feeders
Moss animals

Question 6

Choanocytes

Answer 6

a flagellated cell with a collar of protoplasm at the base of the flagellum - found in sponges.

Question 7

Chordates

Answer 7

Animal having at some stage of development a notochord (flexible spinal column) and nerve cord running along the back, a tail stretching above and behind the anus, and gill slits.

Question 8

Ecdysozoans

Answer 8

Type of Protosome

Question 9

Eumetazoans

Answer 9

is a clade comprising all major animal groups except sponges, placozoa, and several other extinct or obscure life forms

Question 10

Eutherians

Answer 10

Clade

a mammal of the major group Eutheria, which excludes the marsupials and monotremes.

Question 11

Hexapod

Answer 11

a six-legged arthropod

Question 12

Holometabolous

Answer 12

Complete metamorphism

Form of insect development which includes four life stages – as an embryo or egg, a larva, a pupa and an imago or adult

Question 13

Incomplete Metamorphosis

Answer 13

A type of metamorphosis in which an insect hatches from an egg and then goes through several nymphal stages. Each nymphal stage looks like a small version of the adult but getting slightly bigger with age.

Question 14

Instars

Answer 14

A phase between two periods of moulting in the development of an insect larva or other invertebrate animal.

Question 15

Lophophore

Answer 15

a structure in certain small marine invertebrates, having the shape of a horseshoe and bearing ciliated tentacles around the mouth.

Question 16

Mandibulates

Answer 16

Have characteristic feature of mandibles or jaws

Question 17

Medusa

Answer 17

a form of cnidarian in which the body is shaped like an umbrella

Question 18

Mesoglea

Answer 18

also known as mesohyl, is the translucent, non-living, jelly-like substance found between the two epithelial cell layers (i.e., between the ectoderm and endoderm) in the bodies of cnidarians and sponges.

Question 19

Mollusk

Answer 19

a soft unsegmented body and live in aquatic or damp habitats, and most kinds have an external calcareous shell.

Question 20

Notochord

Answer 20

a cartilaginous skeletal rod supporting the body in all embryonic and some adult chordate animals.

Question 21

Polyp

Answer 21

a solitary or colonial sedentary form of a coelenterate

Question 22

Proboscis

Answer 22

an elongated sucking mouthpart that is typically tubular and flexible.

Question 23

Swim bladders

Answer 23

a gas-filled sac present in the body of many bony fishes, used to maintain and control buoyancy.

Question 24

Trochopore

Answer 24

the planktonic larva of certain invertebrates

Question 25

Visceral Mass

Answer 25

Part of gastropods is always contained within the shell; it generally holds the bulk of the digestive, reproductive, excretory, and respiratory systems.

Question 26

Water Vascular System

Answer 26

a network of water vessels in the body, the tube feet being operated by hydraulic pressure within the vessels.