1. Amphibians Study Guide
Chapter 30 Section 2
Amphibians Study Guide
Essential Question:
How have amphibians adapted to life on land?
Objectives:
To relate the demands of a terrestrial environment to the adaptations of amphibians.
To relate the evolution of the three-chambered heart to the amphibian lifestyle.

2. Many frogs and toads use ________ as a defense against predators.
The activity level of amphibians requires more oxygen, which is supplied by a(n) ____.
Many frogs and toads use ________ as a defense against predators.
List 3 differences between frogs and fish.
Of the following, which is not a characteristic of amphibians:
Fertilization is external
Are ectotherms
Have 4 chambered hearts
Eggs hatch into tadpoles

3. In amphibians, the _____ is the most important organ of gas exchange
Amphibians are _____ because their body temperature changes with the temperature of the surroundings.
Salamanders are unlike frogs and toads because they have
What is unique about colorful frogs from South and Central America?

4. Early amphibians needed large amounts of food and oxygen to ________.
Of the following, which is not a member of the order amphibia?
Apoda
Anura
Caudata
Agnatha

5. Amphibians live mostly in regions that have warm temperatures because they are ectotherms whose body temperatures change with the temperature of the _____.
Frogs and toads have sound-producing bands of tissues in their throat called _______.
Frogs have a tympanic membrane that ___.
What are the characteristics of Caecilians?

6. Scientists believe that amphibians evolved from ____.
Frogs and toads have bands of tissue in their throats called _____, which are capable of producing a wide range of sounds.

7. See page ______ for more information on reading the chart.

8. See the chart to answer these questions:
How many eggs are hatched at 20 degrees C?
At which temperature did the fewest eggs hatch?
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Which Order do frogs and toads belong to?
Of the following, which is the order for salamanders and newts?
Apoda
Caudata
Anura
osteicheyes

9. Oviparous refers to an animal that ________. True or false:
The process by which frogs grow from egg to adult is known as ___________.
Oviparous refers to an animal that ________.
True or false:
Juvenile frogs have fully formed lungs after hatching.
Caecilians can be found in ________.
A salamanders form of defense includes ________ and __________.

10. How is the skin of an amphibian an indicator to the environment and ecosystem?
Match the following terms to their correct definitions:
esophagus
liver
gallbladder
pancreas
stomach
small intestine
large intestine
cloaca
heart
lung
kidney
urinary bladder