Print Options

Card layout:

← Back to notecard set|Easy Notecards home page

Instructions for Side by Side Printing
  1. Print the notecards
  2. Fold each page in half along the solid vertical line
  3. Cut out the notecards by cutting along each horizontal dotted line
  4. Optional: Glue, tape or staple the ends of each notecard together
  1. Verify Front of pages is selected for Viewing and print the front of the notecards
  2. Select Back of pages for Viewing and print the back of the notecards
    NOTE: Since the back of the pages are printed in reverse order (last page is printed first), keep the pages in the same order as they were after Step 1. Also, be sure to feed the pages in the same direction as you did in Step 1.
  3. Cut out the notecards by cutting along each horizontal and vertical dotted line
Print these notecards...Print as a list

39 notecards = 10 pages (4 cards per page)

Viewing:

Campbell Biology Chapter 32 Key Terms

front 1

cleavage

back 1

(1) The process of cytokinesis in animal cells, characterized by pinching of the plasma membrane. (2) The succession of rapid cell divisions without significant growth during early embryonic development that converts the zygote to a ball of cells.

front 2

blastula

back 2

A hollow ball of cells that marks the end of the cleavage stage during early embryonic development in animals.

front 3

gastrulation

back 3

In animal development, a series of cell and tissue movements in which the blastula-stage embryo folds inward, producing a three-layered embryo, the gastrula.

front 4

gastrula

back 4

An embryonic stage in animal development encompassing the formation of three layers: ectoderm, mesoderm, and endoderm.

front 5

larva

back 5

A free-living, sexually immature form in some animal life cycles that may differ from the adult animal in morphology, nutrition, and habitat.

front 6

metamorphosis

back 6

A developmental transformation that turns an animal larva into either an adult or an adult-like stage that is not yet sexually mature.

front 7

Ediacaran biota

back 7

An early group of soft-bodied, multicellular eukaryotes known from fossils that range in age from 565 million to 550 million years old.

front 8

Cambrian explosion

back 8

A relatively brief time in geologic history when many present-day phyla of animals first appeared in the fossil record. This burst of evolutionary change occurred about 535–525 million years ago and saw the emergence of the first large, hard-bodied animals.

front 9

body plan

back 9

In multicellular eukaryotes, a set of morphological and developmental traits that are integrated into a functional whole—the living organism.

front 10

radial symmetry

back 10

Symmetry in which the body is shaped like a pie or barrel (lacking a left side and a right side) and can be divided into mirror-imaged halves by any plane through its central axis.

front 11

bilateral symmetry

back 11

Body symmetry in which a central longitudinal plane divides the body into two equal but opposite halves.

front 12

dorsal

back 12

Pertaining to the top of an animal with radial or bilateral symmetry.

front 13

ventral

back 13

Pertaining to the underside, or bottom, of an animal with radial or bilateral symmetry.

front 14

anterior

back 14

Pertaining to the front, or head, of a bilaterally symmetrical animal.

front 15

posterior

back 15

Pertaining to the rear, or tail end, of a bilaterally symmetrical animal.

front 16

cephalization

back 16

An evolutionary trend toward the concentration of sensory equipment at the anterior end of the body.

front 17

ectoderm

back 17

The outermost of the three primary germ layers in animal embryos; gives rise to the outer covering and, in some phyla, the nervous system, inner ear, and lens of the eye.

front 18

endoderm

back 18

The innermost of the three primary germ layers in animal embryos; lines the archenteron and gives rise to the liver, pancreas, lungs, and the lining of the digestive tract in species that have these structures.

front 19

diploblastic

back 19

Having two germ layers.

front 20

triploblastic

back 20

Possessing three germ layers: the endoderm, mesoderm, and ectoderm. Most eumetazoans are triploblastic.

front 21

mesoderm

back 21

The middle primary layer in a triploblastic animal embryo; develops into the notochord, the lining of the coelom, muscles, skeleton, gonads, kidneys, and most of the circulatory system in species that have these structures.

front 22

body cavity

back 22

A fluid- or air-filled space between the digestive tract and the body wall.

front 23

coelom

back 23

A body cavity lined by tissue derived only from mesoderm.

front 24

coelomate

back 24

An animal that possesses a true coelom (a body cavity lined by tissue completely derived from mesoderm).

front 25

pseudocoelomate

back 25

An animal whose body cavity is lined by tissue derived from mesoderm and endoderm.

front 26

acoelomate

back 26

A solid-bodied animal lacking a cavity between the gut and outer body wall.

front 27

protostome development

back 27

In animals, a developmental mode distinguished by the development of the mouth from the blastopore; often also characterized by spiral cleavage and by the body cavity forming when solid masses of mesoderm split.

front 28

deuterostome development

back 28

In animals, a developmental mode distinguished by the development of the anus from the blastopore; often also characterized by radial cleavage and by the body cavity forming as outpockets of mesodermal tissue.

front 29

spiral cleavage

back 29

A type of embryonic development in protostomes in which the planes of cell division that transform the zygote into a ball of cells are diagonal to the vertical axis of the embryo. As a result, the cells of each tier sit in the grooves between cells of adjacent tiers.

front 30

determinate cleavage

back 30

A type of embryonic development in protostomes that rigidly casts the developmental fate of each embryonic cell very early.

front 31

radial cleavage

back 31

A type of embryonic development in deuterostomes in which the planes of cell division that transform the zygote into a ball of cells are either parallel or perpendicular to the vertical axis of the embryo, thereby aligning tiers of cells one above the other.

front 32

archenteron

back 32

The endoderm-lined cavity, formed during gastrulation, that develops into the digestive tract of an animal.

front 33

blastopore

back 33

In a gastrula, the opening of the archenteron that typically develops into the anus in deuterostomes and the mouth in protostomes.

front 34

Eumetazoans

back 34

Member of a clade of animals with true tissues. All animals except sponges and a few other groups are this.

front 35

Bilaterians

back 35

Member of a clade of animals with bilateral symmetry and three germ layers.

front 36

Ecdysozoans

back 36

Member of a group of animal phyla identified as a clade by molecular evidence. Many are molting animals.

front 37

Lophotrochozoans

back 37

Member of a group of animal phyla identified as a clade by molecular evidence. They include organisms that have lophophores or trochophore larvae.

front 38

lophophore

back 38

In some lophotrochozoan animals, including brachiopods, a crown of ciliated tentacles that surround the mouth and function in feeding.

front 39

trochophore larva

back 39

Distinctive larval stage observed in some lophotrochozoan animals, including some annelids and molluscs.