Section: Characteristics of Animals
Name:____________________________
In the space provided, write the letter of the description that best matches each term.
1. __c___ multicellular
a. eats particles that drift by in the water
2. ___d__ heterotroph
b. animal that has a backbone
3. __e___ invertebrate
c. made of many cells
4. __a__ filter feeder
d. organisms that obtain food from the environment
5. __b__ Vertebrate
e. any animal that does not have a backbone
Complete each statement by writing the correct term in the space provided.
6. Animals are heterotrophic, organisms that cannot __produce their own organic compounds__.
7. Animals are unique amongst living things because they are __able to perform rapid, complex
movements_.
8. Unlike some protists and all bacteria, which are ___UNICELLULAR__, animals are
__MULTICELLULAR__. This allows them to develop into a variety of shapes and sizes.
9. Ploidy refers to the number of copies of __CHROMOSOMES_. Almost all animals are _DIPLOID__.
This allows for creating ___GENETIC VARIATION___.
10. Almost all animals reproduce __SEXUALLY__
11. Animals are the only __MULTICELLULAR__ organisms that lack a __CELL WALL__ allowing for
greater _MOBILITY_.
12. During zygotic development, animals form a __BLASTULA_, which develops into 3 distinct layers.
13. The __ECTODERM__ is the layer of cells in the blastula that gives rise to the outer layer of skin, the
nervous system, and the sense organs.
14. The __ENDODERM_ is the layer of cells in the blastula that gives rise to the lining of the digestive
tract, respiratory system, and many glands.
15. The ___MESODERM__ is the layer of cells in the blastula that develops into muscles, circulatory
system, reproductive organs, and excretory organs.
16. Animals can form __TISSUE_, which are groups of cells that WORK TOGETHER TO PERFORM
SPECIFIC FUNCTIONS_.
17. Kingdom Animalia contains about 35 major divisions called __PHYLA__.
In the space provided, write the letter of the description that best matches each term.
a. body parts arranged around a central axis, like the spokes of a bicycle
18. __C__ body plan
wheel
b. sensory structures and nerves concentrated at the body’s anterior
19. __D___ asymmetrical
c. a term used to describe an animal’s shape, symmetry, and internal
20. __A__ radial symmetry
organization
21. ___B__ cephalization
d. body is irregularly shaped
e. body has a distinct right and left half
22. __E___ bilateral
symmetry
23. The Kingdom Animalia is broken down into 35 divisions called ___PHYLA___.
24. The 9 major phyla, starting with most basic to the most complex, are:
25. The animal kingdom is divided or into two groups: __VERTEBRATES__ & __INVERTEBRATES_.
Place the list in the order in which they evolved.
26. ____ Multicellularity ___
a. Coelom
27. ______ Tissues _____________
b. Deuterostomes
28. _______ Bilateral symmetry ___________
c. Tissues
29. ________ Body cavity _______________
d. Multicellularity
30. ________ Coelom ______________
e. Notochord
31. ______ Jointed appendages ______
f.
32. _____ Deuterostomes ______
g. Body cavity
33. ______ Notochord _________
h. Bilateral symmetry
Jointed appendages
In the space provided, write the letter of the description that best matches each term.
1. __C__ respiratory system
a. enables digestion of foods that are larger than individual cells
2. __A__ digestive system
b. consists of water that is contained under pressure in a closed container
3. __E__ circulatory system
c. takes in oxygen and releases carbon dioxide
4. __B__ hydrostatic skeleton
d. removes wastes produced by cellular metabolism
5. __D__ excretory system
e. transports oxygen and nutrients
Complete each statement by underlining the correct term in the brackets.
6. A few animals digest small food directly into their __BODY CELLS___ whereas many animals digest
their food within a __DIGESTIVE CAVITY__.
7. The two types of digestive cavities are ___GASTROVASCULAR CAVITY__ and a __GUT__.
8. The three types of respiration in animals is _DIFFUSION_ (gas exchange _DIRECTLY_ with its
environment), _GILLS_ (thin projections of tissue __RICH WITH BLOOD VESSELS__), and lungs (an
internal __RESPIRATORY SYSTEM__ that allows animals to breathe on __DRY LAND__.
9. There are two types of circulatory systems__OPEN__ and ___CLOSED__.
10. All animals, except sponges, have __NERVE CELLS__ that carry __ELECTRIC IMPULSES_ that help
coordinate activities in a body.
11. A _SKELETON_ provides a framework that supports a body.
12. There are __3_ types: They are:_HYDROSTATIC, EXOSKELETON_, and ___ENDOSKELETON__.
13. __HYDROSTATIC__ is a skeleton that consists of __WATER__ contained under __PRESSURE__.
14. An __EXOSKELETON_ is a rigid _EXTRENAL__ skeleton that __ENCASES_ the body.
15. An _ENDOSKELETON_ is composed of __HARD MATERIAL_ inside the animal.
16. Animals have _TWO_ types of reproductive strategies.
17. When an individual reproduces by making an exact copy of itself, it is undergoing [asexual / sexual]
reproduction.
18. New individuals are formed by the union of male and female gametes in [sexual / asexual]
reproduction.
19. Male gametes are produced in the [testes / ovaries].
20. Among corals, new colonies are produced by [sexual / asexual] reproduction.