Unit 10 - Invertebrates

Question 1

Body parts that radiate from the center of the animal are called ____ ____ body plan.

Answer 1

RADIAL SYMMETRY

Question 2

In this kind of symmetry there is a ___ and ___ but no right or left.

Answer 2

TOP
BOTTOM

Question 3

A body plan that cuts an animal into right and left halves is called _____ ______.

Answer 3

BILATERAL SYMMETRY

Question 4

In animal reproduction, the egg and sperm unite to form a ___

Answer 4

ZYGOTE

Question 5

During the early embryonic stage of animal development, the ______ is the stage that has a hollow ball of cells

Answer 5

BLASTULA

Question 6

In the later, ______ stage of development, the embryo will form what will become the gastrointestinal tract

Answer 6

GASTRULA

Question 7

the ______ is the outer layer of embryonic cells that gives rise to the outer covering of the animal

Answer 7

ECTODERM

Question 8

the _______ is the middle layer of embryonic cells that forms most muscles and internal organs

Answer 8

MESODERM

Question 9

the _____ is the inner layer of embryonic cells that will form the digestive tract

Answer 9

ENDODERM

Question 10

the anatomical name for the part of an animal towards the head is ______

Answer 10

ANTERIOR

Question 11

the anatomical name for the part of an animal towards the tail is ______

Answer 11

POSTERIOR

Question 12

the anatomical name for the part of an animal towards the back is ______

Answer 12

DORSAL

Question 13

the anatomical name for the part of an animal towards the bottom or underneath side is ____

Answer 13

VENTRAL

Question 14

the scientific name for all sponges is _____ meaning pores in their skin

Answer 14

PORIFERA

Question 15

sponges are considered the simplest of all animals because they lack ___, ____, and ____

Answer 15

MUSCLES
NERVES
TISSUES

Question 16

sponges have specialized cells called _____ which sweep water through the sponge’s body and traps food in mucus

Answer 16

CHOANOCYTES