court observation

Topics: Frog, Amphibian, Tadpole Pages: 4 (1038 words) Published: September 22, 2014


FROGS
CHAPTER I

OBJECTIVES:
The objective of this research is to describe that frog exists here on earth, how they live, reproduce, their characteristics and their role in ecosystem.

INTRODUCTION:
Frogs are the most familiar group of amphibians. Their are a diverse and largely carnivorous group of short-bodied, tailless amphibians composing the order Anura.. The term frog is used to refer to anuran species that have smooth, moist skin. As the frog grows it moves through these stages in a process known as metamorphosis. Frogs are not the only animals to undergo metamorphosis, most other amphibians also undergo remarkable changes throughout their life cycles, as do many species of invertebrates. They lay their eggs in water. The eggs hatch into a tadpole which lives in water until it metamorphoses into an adult frog. The common pond frog is ready to breed when it is only three years old. Frogs can see forwards, sideways and upwards all at the same time. They never close their eyes, even when they sleep. Although frogs live on land their habitat must be near swamps, ponds or in a damp place. This is because they will die if their skin dries out. Instead of drinking water, frogs soak it into their body through their skin. Frogs breathe through their nostrils while also absorbing about half the air they need through their skin. Frogs make vocalizations, or calls, by forcing air through their larynx. Such vocalizations usually function as mating calls. Males often call together in a loud chorus. Frogs can live for may years, unless they are eaten by another predator or die of accidental causes or illness.

The study sought to answer the following questions:
1.Why do so many frogs come out onto roads when it rains? 2.What's the difference between a frog and a toad? 3.How do frogs reproduce?
4. Why do frogs jump?
5. Why...
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