Answer for this quize

1. The energy used by living beings on the earth to feed, move, and reproduce all comes from what original source? Your Answer: the sun The energy of the sun is captured by plants and algae by photosynthesis. 88% of players have answered correctly.

2. Jellyfish have a body plan that is described by biologists as: Your Answer: coelenterate Coelenterate means 'sac-like,' and refers to the existence of a blind feeding pouch known as a coelenteron. Examples of other coelenterates include sea anemones and freshwater hydras. 47% of players have answered correctly.

3. Which of the following is composed of nervous tissue? Your Answer: the spinal cord The spinal cord is really a direct extension of the brain. 83% of players have answered correctly.

4. A leech survives by feeding off the blood of other, larger beings. This type of behavior is known as: Your Answer: parasitism 92% of players have answered correctly.

5. Lobsters, crabs, and shrimp all belong to what group of animals? Your Answer: Arthropoda Insects also belong to this group, making it the largest among all animal phyla. 71% of players have answered correctly.

6. Which of the following lives in a cocoon for part of its life cycle? Your Answer: a moth A cocoon protects the pupa of some insects during metamorphosis. 93% of players have answered correctly.

7. Which of the following vertebrates lacks a bony spine? Your Answer: a lamprey Hagfishes, lampreys, rays, sharks, and eels are the only vertebrates without a bony skeleton. 61% of players have answered correctly.

8. Where are you more likely to find the largest number of living organisms (including microbes) in one gallon of water? Your Answer: Arctic Ocean Cold, turbulent waters harbor the most biomass, in part because oxygen dissolves more in cold water than warm water. 23% of players have answered correctly.

9. Why do fish swim in schools? Your Answer: to confuse predators Apparently, predators must focus on just one fish in order to strike successfully. Distracted by the school, they lose focus. 78% of players have answered correctly.

10. Which of the following animals are gutless? Your Answer: tapeworms Because the tapeworm lives inside the gut of a host, it has evolved to absorb nutrients directly from outside its body. 38% of players have answered correctly.

11. Many herbivorous animals, such as rabbits, will pass partially digested food in the feces only to be eaten again for further digestion. What is this process called? Your Answer: refection Rabbit nutrition actually depends on it. Separate pellets are passed as true feces. 23% of players have answered correctly.

12. Bacteria of the genus Rhizobium form nodules on the roots of leguminous plants. They are important in the food cycle because: Your Answer: They fix nitrogen into nitrates Rhizobium species and cyanobacteria can both do this. Without them, DNA, proteins, and all life as we know it would not be possible. 73% of players have answered correctly.

13. The overgrowth of algae in ponds and lakes that occurs when nitrates from the soil escape into groundwater is called: Your Answer: eutrophication Eutrophication means 'causing good growth.' Overgrowth and decomposition of algae can (paradoxically) steal oxygen from the water, causing fish and other creatures to die. 45% of players have answered correctly.

14. The increasing use of nitrogen fertilizers has sent more and more nitrous oxide into the atmosphere and water during the last century. Which of the following problems on earth is partly due to this fact? Your Answer: overgrowth of algae in streams and lakes, leading to decreased oxygen levels Although nitrous oxide (laughing gas) can cause silly behavior, scientists have not yet found a link to Jerry Springer. 52% of players have answered correctly.

15. What is a gizzard? Your Answer: a muscular digestive organ, often containing small stones to help grind food 78% of players have answered correctly.

16. An animal that eats only meat is called: Your Answer: a carnivore 95% of players have answered correctly.

17. In almost every species of mammals, the female is only receptive to mating during a certain time of year. This period is called: Your Answer: estrus All mammals have hair. Yet more proof that Dennis Rodman is a mammal. 64% of players have answered correctly.

18. The word 'taxon' refers to what? Your Answer: a category that describes animals which have a defined set of homologous structures Thus, organisms are classified by taxonomy. 56% of players have answered correctly.

19. What is the scientific term for a 'cold-blooded' animal? Your Answer: a poikilotherm Poikilotherms such as reptiles aren't actually cold. Their body temperature varies and is regulated by the environment and their behavior. Perhaps more common is the term 'ectotherm,' referring to the fact that the animals must rely on external heat. 22% of players have answered correctly.

20. In many invertebrates, especially flatworms, ovaries and testes occur in the same animal. This is called: Your Answer: a hermaphrodite Hermaphrodites are normally unable to fertilize themselves. 81% of players have answered correctly.