and it can happen six to ten times during the first year of rapid growth. For a few days following each molt‚ crayfish have soft exoskeletons and are more vulnerable to predators. Crayfish often conceal themselves under rocks or logs. They are nocturnal animals and they feed largely on snails‚ algae‚ insect larvae‚ worms‚ and tadpoles. Adult Crayfish are active from dusk to dawn‚ and young crayfish are active from dawn to dusk. Their movement is always a slow walk‚ but crayfish also use rapid flips
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Crinoids‚ commonly known as ‘sea lilies’‚ are marine echinoderms that first appear in the fossil record in marine sediments deposited approximately 530 million years ago during the Cambrian Period and were very abundant during the Palaeozoic Era. Paleozoic seas were dominated by crinoid echinoderms. The Permian extinction‚ 244 million years ago‚ devastated the marine biota. Tabulate and rugose corals‚ blastoid echinoderms‚ graptolites‚ and most crinoids died out‚ as did the last of the trilobites
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You may not be aware of what bedbugs symptoms are. It’s not unusual since bed bugs along with many other pests were exterminated when DDT was widely used in the United States following World War I. But now international travel and world-wide commerce is making the bugs symptoms become much more common. But many times people ignore these symptoms until they become aware of the excessive itching and finds the insect bite marks. These bites can be mistaken for those of mosquitoes or even dust mites
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Examining someone while sleeping can be extremely interesting‚ but also scary and sometimes dangerous. Many people in this world‚ may not realize how important it is to analyze people while they are sleeping. Some may think that these people are just having dreams or nightmares. Actually‚ these people may have parasomnias‚ more commonly known as night terrors. During these episodes while sleeping people may have (REM) which is rapid eye movement‚ they also may kick‚ fight‚ scream‚ talk‚ walk‚ or
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How and Why Do Crickets Chirp? The cricket’s call‚ a sound familiar to almost everyone across the globe‚ can vary from isolated clicks to repetitive chirps to long trills. While the females are mute‚ most male crickets can be loud musicians‚ producing species-specific songs up to 100 decibels‚ about the same volume as a motorcycle or a power drill. They create their songs by a method that is very different from human vocalization. http://www.nytimes.com/2006/01/31/science/31obox.html?_r=0 Cricket
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A wildlife biologist has an array of duties where it can range from studying and recording data from animals in controlled and natural environments‚ or reporting scientific findings to scholars‚ and or the press. However‚ the main focus is on how each animal interacts with their ecosystems‚ and fellow animals. A Wildlife Biologist would conduct a series of test and record data such as; height‚ width‚ age‚ sex‚ physical traits‚ nutrition levels‚ diseases‚ and behavioral patterns. Most wildlife biologist
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sighed‚ giving into Michael’s pull‚ and read‚ "Awkward‚ and almost always the idiot / savant‚ mutant‚ retard‚ I / travel my own effervescent weather‚ / in my underwater / vessel‚ my sweet / mars‚ and soundless / daydream‚ magical sweep of Rimbaudian / reverie. Always / clumsy‚ and guileless‚ mind- / blind‚ and deathly shy." He wanted to speak‚ but he found himself choking on the words that tried to come out. As he struggled to breathe‚ he decided to swallow the words instead. “Isn’t it funny how day
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I couldn’t sleep. I had woken in the middle of the night the day after her death. I saw Mum sitting at the dinner table. Her face was an ashen grey with worry and her lips were set in a thin line as if she was struggling not to cry. I started to get dressed very slowly‚ pulling a brush through my hair. The cuffs of my cosy cardigan suddenly felt itchy and irritated against my skin. As I reached to get my hairspray‚ I knocked a photo off. It landed upside down on the floor. I bent down to
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During the Middle Ages‚ Courtly love was a code which prescribed the conduct between a lady and her lover (Britannica). The relationship of courtly love was very much like the feudal relationship between a knight and his liege. The lover serves his beloved‚ in the manner a servant would. He owes his devotion and allegiance to her‚ and she inspires him to perform noble acts of valor (Schwartz). Capellanus writes‚ in The Art of Courtly Love‚ “A true lover considers nothing good except what he thinks
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determine their social status. All cats are basically equal‚ one doesn’t dominate over another. Another difference is the signals cats give off. When a cat holds its tail up in the it shows a sign of happiness. Another difference is that cats are nocturnal‚ meaning they go out at night. They also have retractable claws‚ unlike dogs. Cats seem to be very well-balanced and a lot more flexible than dogs. Most would say that cats have a higher
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