1. What is the difference between a reptile and an amphibian?
Reptiles are clad in scales, shields, or plates and their toes have claws. Young reptiles are miniature replicas of their parents in general appearance if not always in coloration and pattern. Reptiles include alligators, crocodiles, turtles and snakes.
Amphibians have moist, glandular skins, and their toes lack claws. Their young pass through a larval, usually aquatic stage before they metamorphose (change in form & structure) into the adult form. Amphibians include salamanders, toads, and frogs. Back to questions

2. Which taxonomical term is the most specific term used to classify humans?
Sapiens, the species name, is the most specific term used to classify humans. The species is the basic unit in the system of classification. Back to questions

3. In the past, euglena and amoeba were difficult to classify as either plants or animals. Currently, these organisms are classified as... protists Back to questions

4. Which characteristics of organisms are most commonly used to place them in a specific kingdom in the five-kingdom classification system?
The type of nutrition, number of cells, and basic structure are characteristics of organisms most commonly used to place them in a specific kingdom. Organisms are classified on the basis of similarities in their physical structures and nutrition type. Back to questions

5. There are approximately 4,250 species of mammals. What specific type of animal makes up nearly one-fourth of all the mammal species? BAT Back to questions

6. Why do lifeguards use vinegar on Jellyfish stings? They use vinegar on jellyfish stings because the vinegar discharges the harmful nematocyst of the Chironex Flederi. A multi-tentacular jellyfish called the Physalia (found in Australia) releases nematocysts that can be discharged by vinegar. In stings that aren't very severe firing can be blocked by the vinegar. But vinegar is not a necessary medical step. Back to questions

7. What is krill? Krill (Euphausiids) is the name applied to planktonic crustaceans that constitute the diet of many whales, particularly baleen whales, and invertebrates such as fish, penguins, and sea birds. Blue whales, largest of the world's animals, live on euphausiids, and a whale's stomach can contain four tons of krill. Euphausiids are all marine. Most of the 85 species feed by filtering plankton from the water. Generally, they resemble primitive decapods such as shrimp and lobsters. Back to questions