Section: Characteristics of Animals
Name:____________________________
In the space provided, write the letter of the description that best matches each term.
1. _____ multicellular
a. eats particles that drift by in the water
2. _____ heterotroph
b. animal that has a backbone
3. _____ invertebrate
c. made of many cells
4. _____ filter feeder
d. organisms that obtain food from the environment
5. _____ 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 ______________________
______________________.
7. Animals are unique amongst living things because they are _______________________________.
8. Unlike some protists and all bacteria, which are ________________, animals are _________________.
This allows them to develop into a variety of shapes and sizes.
9. Ploidy refers to the number of copies of __________________. Almost all animals are
______________. This allows for creating ______________________________________________.
10. Almost all animals reproduce __________________________
11. Animals are the only __________________________ organisms that lack a ________ ___________
allowing for greater______________.
12. During zygotic development, animals form a _______________, which develops into 3 distinct layers.
13. The ______________________ 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 ______________________ 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 ______________________ is the layer of cells in the blastula that develops into muscles,
circulatory system, reproductive organs, and excretory organs.
16. Animals can form ____________, which are groups of cells that _______________________________
________________________________________.
17. Kingdom Animalia contains about 35 major divisions called ______________________.
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. _____ body plan
wheel
b. sensory structures and nerves concentrated at the body’s anterior
19. _____ asymmetrical
c. a term used to describe an animal’s shape, symmetry, and internal
20. _____ radial symmetry
organization
21. _____ cephalization
d. body is irregularly shaped
e. body has a distinct right and left half
22. _____ bilateral symmetry
23. The Kingdom Animalia is broken down into 35 divisions called _________________.
24. The 9 major phyla, starting with most basic to the most complex, are:
25. The animal kingdom is divided or into two groups: ____________________ & ___________________.
Place the list in the order in which they evolved.
26. _______________________________
a. Coelom
27. _______________________________
b. Deuterostomes
28. _______________________________
c. Tissues
29. _______________________________
d. Multicellularity
30. _______________________________
e. Notochord
31. _______________________________
f.
32. _______________________________
g. Body cavity
33. _______________________________
h. Bilateral symmetry
Jointed appendages
In the space provided, write the letter of the description that best matches each term.
1. _____ respiratory system
a. enables digestion of foods that are larger than individual cells
2. _____ digestive system
b. consists of water that is contained under pressure in a closed container
3. _____ circulatory system
c. takes in oxygen and releases carbon dioxide
4. _____ hydrostatic skeleton
d. removes wastes produced by cellular metabolism
5. _____ 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 _____________ _______ whereas many animals
digest their food within a _____________ ______________.
7. The two types of digestive cavities are ______________________ ____________ and a ________.
8. The three types of respiration in animals is ______________ (gas exchange ____________ with its
environment), _____________ (thin projections of tissue ____________________), and lungs (an
internal ________________ _____________ that allows animals to breathe on _______ __________.
9. There are two types of circulatory systems__________ and ____________.
10. All animals, except sponges, have _________ ________ that carry ____________ ______________
that help coordinate activities in a body.
11. A ____________________ provides a framework that supports a body.
12. There are _____ types: They are:________________________, _______________________, and
___________________________.
13. ______________ is a skeleton that consists of ________________ contained under ______________.
14. An _________________ is a rigid ______________ skeleton that ________________ the body.
15. An _________________ is composed of _____________ ______________ inside the animal.
16. Animals have ____________ 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.