26-1 Introduction to the Animal Kingdom
1. Animals are _______________________________,
eukaryotic heterotrophs that lack ____________________
2. What is a tissue? _________________________________________________________
3. What type of tissue covers body surfaces? ______________________________________
4. What percent of animal species are invertebrates? __________
5. Invertebrates are animals that do not have a ______________________________
6. List 3 examples of invertebrates: ___________________________________________
7. Mammals, amphibians, reptiles and birds are all ______________________ (have a backbone)
8. __________________________ describes a relatively stable internal environment.
9. Match the following according to what they eat
_________ Herbivores a. other animals
_________ Carnivores b. plants
_________ Omnivores c. both plants and animals
10. What type of animal feeds on decaying plant and animal material? __________________
11. A ________________________ relationship is where two animals live in close association with
12. Respiration means that an animal takes in _______________ and gives off _______________
13. Large animals require a ____________________________ to move materials around within their
14. A primary waste product of a cell is ________________________
15. What system is responsible for eliminating waste? __________________________________
16. What system is responsible for responding to the environment? ________________________
17. Muscle contraction enables motile animals to move around, usually by working in combination
with a support structure called a _____________________________
18. Sexual reproduction helps to create and maintain genetic __________________________
19. ___________________ reproduction produces offspring that are identical to the parent.
Trends in Animal Evolution
20. Complex animals tend to have high levels of cell _____________________ and internal body
21. View figure 26-3, answer True (T) or False (F) to the following:
__________ Mollusks are more closely related to roundworms than to annelids
__________ Mollusks, annelids, and arthropods all have a coelom.
__________ Sponges do not have tissues.
22. Tissues join together to form __________________ and organ systems.
23. Animals that reproduce sexually begin life as a ______________________________
24. A __________________________ is a hollow ball of cells.
25. A ___________________________ is an animal whose anus if formed from the blastopore.
26. Match the following germ layers to what they develop into:
__________ Endoderm a. muscles
___________Mesoderm b. skin
___________ Ectoderm c. lining of digestive tract
27. What type of animal does NOT have a type of body symmetry? ____________________
28. What type of symmetry does a sea anemone have? _____________________
29. Animals that have a left and right side have ___________________ symmetry.
30. When the body is constructed of many repeated and similar parts, the animal is said to be
31. The concentration of nerve cells and sense organs at the front end of the body is called
32. What is the anterior end of the body called (on bilaterally symmetrical animals) ___________
33. Why is a body cavity important? ________________________________________________
34. Label the sides of the dolphin.
(See Figure 26-5)