...egg to a tadpole, and then in the quadruped animal, the frog was considered strange creature and was a symbol of emerging and ever-renewing life. Often, the ancient gods of care arising out of the mire, depicted with frog heads. Goddess of child-birth, who was a good helper of the popular religion, looked like a frog. (“Heqet”) This essay will describe frog’s transformation from egg to adult frog by three steps. First of all, frogs lay eggs. When multiple eggs stick together, they are collectively known as frogspawn. After fertilization, the innermost portion liquefies to allow free movement of the developing embryo. Most eggs are black or dark brown, and it has the advantage of absorbing heat from the sun, which holds the insulating capsule. Frogs lay a lot of eggs because there are many dangers between fertilization and grown frog. Those eggs that die turn white. Life starts right as the central yolk splits in two. It then divides into four, then eight, etc. Soon, the embryo starts to look more and more like a tadpole, getting longer and moving in egg. Usually, about 6-21 days after being fertilized, the egg will hatch. Most eggs are found in calm or static waters. When the rain comes along, after development of 7 to 9 Tikhomirova 2 days, the foam drips down, drop tiny tadpoles into the river or pond below. (“Life Cycle of a Frog”) The next step is tadpoles. Soon after hatching, the tadpole still feeds on the remaining yolk, which is actually in his gut. Tadpole is currently...
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...I chose red eyed tree frog because they are fascinating. They’ve been around for millions of years. They are masters of disguise. They start off as eggs, and then they become tadpoles. Tadpoles can hatch early. It takes a while for tadpoles to grow up. As adults, they have big red eyes, and long legs. The males are smaller than the females. During breeding season, males jump on a leaf to make it move, then a female goes to them, and they breed. Mating season generally last from fall to early spring. Red eyed tree frogs live five years in their habitat and live more years in captivity. The frogs have a striking green body with blue...
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...Bizarre extinct frog brought back to life March 16, 2013, 10:55 am By environment reporter Sarah Clarke ABC Imagine a frog that can swallow its eggs, brood its young in its stomach and give birth through its mouth. The gastric brooding frog existed 30 years ago, but the extraordinary amphibian is now extinct. In a world first, a team of Australian scientists has taken the first major step in bringing it back to life. They have successfully reactivated its DNA and produced an embryo. Professor Mike Archer from the University of New South Wales is part of the team, which also includes researchers from the University of Newcastle. He says the amphibian was no ordinary frog. "In the stomach these eggs went on to develop into tadpoles and the tadpoles then went on to develop into little frogs," he told ABC radio's AM program. "And like any pregnant mum, when you have little babies rattling away in your stomach saying, 'let me out', she would then open her mouth and out would pop little frogs. "The first people that saw that were aghast. By the time anybody got excited about it, suddenly it was extinct. "So that's certainly one of the driving reasons why this would be a focal animal for seeing if we can de-extinct this amazing frog." That is exactly what a team of Australian scientists is doing. After locating a few carcases stored in a deep freezer, they have been able to recover tissue from the gastric brooding frog. Using a laboratory technique known as somatic cell nuclear transfer...
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...my students’ ability to access the content? How does this strategy facilitate my students’ ability to comprehend the mentor text, build essential knowledge, or produce oral or written discourse connected to the content objective? How does this strategy provide comprehensible input for my students? | Lesson Sequence:This week in Science we will learn about tadpoles and frogs. To help us organize our learning, we are going to use a KWL chart. An empty KWL chart will be displayed. The teacher will review the purpose of a KWL chart and then ask the students about what they already know about tadpoles and frogs. The students will turn and talk to discuss with their partner what they already know about tadpoles and frogs. The teacher will then call on one partner to announce what they know. The teacher will fill in the KWL chart with the students telling what they already know about tadpoles and frogs. The class will follow the same procedure discussing what they are wondering about the topic. The second partner will tell the teacher what they were wondering and she will write it on the chart.Mentor Text: From Tadpole to Frog by Wendy Pfeffer will be introduced. The teacher will describe the book as nonfiction and explain that a nonfiction book provides us with lots of information and can help us learn about a certain topic.The students will make predictions about what they think they will learn in the story based on cover and illustrations within the text. The 7 Step...
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...Rosalyn P. Bataller 302-A Sir Cafirma TABLE OF SPECIFICATION COMPREHENSION TEST IN SCIENCE FOR GRADE 4 KNOWLEDGE KNOWLEDGE OBJECTIVES | No. of recitation Days | No. of items | Percentage of items | Item Placement | 1. Identify the parts of Skeletal System and their function. | 5 | 5 | 10% | 1-5 | 2. Define Skeletal System. | 1 | 1 | 2% | 6 | 3. Describe the different function of muscles. | 9 | 9 | 18% | 7-15 | COMPREHENSION COMPREHENSION 4. Identify the parts of Digestive System and their function. | 2 | 2 | 4% | 16-17 | 5. Explain the importance of keeping the digestive system healthy. | 2 | 2 | 4% | 18-19 | 6. Give a common ailment of the Digestive System. | 1 | 1 | 2% | 20 | APPLICATION APPLICATION 7. Discover an example of animals that begin life inside their mother’s body and animals that lay eggs. | 5 | 5 | 10% | 21-25 | 8. Identify the stages in the life cycle of a frog and butterflies. | 5 | 5 | 10% | 26-30 | ANALYSIS ANALYSIS 9. Experiment how are Animals useful to us. | 4 | 4 | 8% | 31-34 | SYNTHESIS SYNTHESIS 10. Explain how are AnimalsHarmful to us. | 5 | 5 | 12% | 35-40 | EVALUATION EVALUATION 11. Proper care and handling of animals. | 11 | 11 | 20% | 41-50 | TOTAL | 50 | 50 | 100% | | Rosalyn P. Bataller 302-A ...
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...Tadpole Studies Amphibians are directly killed or are sublethally sickened through the influence of pesticides and or other gro-chemicals. Nitrates and malathion have yield a results that show a negative influence on tadpoles in all parameters. Malathion has showed a high frequency in morphological anomalies. Nitrates ,when tested alone, lacked any significant effects on behavior, total length tadpole mass, and a frequency of abnormalities (Krishnamurthy et a, 2011l). Road salt (NaCl) has threatened water quality and the survival of ecosystems by the continuous application and widespread exposure to deice roads. NaCl has the ability to harm sensitive members of freshwater communities like amphibians. Wood frog larvae were test with realistic concentrations of certain chemicals, the larvae had a low mortality with the chemicals CH4N2O, NaCl, and MgCl2; Wood frog larvae experienced the greater moralities rate with C8H12CaMgO8, CH3COOK and CaCl2. Rana sylvatica...
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...‘Tadpoles’ and ‘Toads’ are two fascinating, descriptive poems written by Fleur Adcock, about her love for toads and frogs. As the titles suggest, ‘Tadpoles’ refers to the birth of several frogs, and ‘Toad’ describes the death of an adult frog. In both poems, there is clear evidence of Adcock’s emotional connectino with the creatures. Adcock draws a personal element by connecting the young tadpoles with her grandson, Oliver. Looking at the tadpoles now, she is reminded of her grandson, when he was ‘[still] a tadpole in Elizabeth’s womb’. Although Oliver is ‘too far away now for [me] to call him across the world’, Adcock makes it clear that she deeply misses him, and wishes he were by her side to witness the growth of these little tadpoles. ‘Toads’ is a different poem, where Adcock mourns the death of her beloved pet toad. However, towards the end of the poem, there is a sense of reincarnation where the toad chooses to turn up to the narrator’s doorstep. The fact that the toad seems to reappear again to them, ‘a little shadow shaped like a brown leaf hoppedout of greener leaves and came to me’ in stanza seven, suggests that the toad may have come in her father’s spirit, suggesting a very personal and spiritual connection. ‘Greener leaves’ highlights the rebirth of the animal and earlier in stanza three, Adcock states that she ‘saw his spirit in every visiting creature’. Perhaps ‘Toads’ is about her appreciation for animals and a sense of belief in reincarnation. Similarly, in ‘Tadpoles’...
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...The typical fanged frog is fewer than five grams and can be as much as two pounds. It’s about 1.5 inches and usually brown or gray in color. On the bottom of their fingers and toes, there are pads of sticky hairs. On their stomach, there is sticky hair, mainly used for climbing trees. Furthermore, this frog is bilateral, meaning it can be divided into two equal halves. The fanged frog lives on land and is mainly found on the island of Sulawesi in Indonesia. Larger ones are found in streams and puddles while smaller ones are most likely to be located in leaf litter. The rainforest has many predators, so the frog has the ability to camouflage with something nearby such as a tree or leaves. Tadpoles tend to eat algae but when they...
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...another. The Scientific names for the two frogs are Pseudophryne Corroboree (southern) and the Pseudophyrne Pengilleyeis (northern). These frogs inhabit numerous sections of the Kosciuszko National Park, However mainly occur in the Snowy Mountain regions and nearby state forests. This is between 950 and 1750 meters above sea level. It is usual for the frogs to reside in cavities In vegetation and soil that have dominant substrates. Corroboree frogs during breeding season live in pools within sphagnum bogs wet tussock grasslands and wet heaths. As a whole they generally prefer shallow pools with low water flow and large surface area. However around mid-summer these pools dry up, which puts the tadpoles at risk during drought season. Due to the pools drying up it allows for the tadpoles to have little predators such as fish as there isn’t enough water left to sustain much larger life. Sadly, based on current climate models of their ecosystem, winter and spring precipitation and snow fall are likely to decrease reducing the water table resulting in earlier pool drying in future...
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...biology study, ion transport and channel physiology study, and used for environmental toxicology and the genetic information of the Xenopus sp. use to study the development of the Xenopus sp. Besides, In the 1930s, Xenopus is use by the doctors to indicates whether the woman pregnant or not because the hormone inside the urine of pregnant woman can induce the production of egg in Xenopus laevis. Then, the scientist or biologist uses the same concept to control the egg production in laboratory and not every frog species can be manipulated and that why Xenopus sp. is widely use. The growth and development of the frog is shorter and within a many days, the eggs turn into tadpole which have fully functional organs and reduce the experiment time for biologists or scientists to examine and indicate the effect towards the tadpole if the experiment being proposed by them towards the Xenopus sp. The genome of the Xenopus laevis have similar to the human genome and the biologists and scientists can manipulate the gene of the Xenopus sp. to study the disease related to human...
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...known as the corpus callosum. The corpus callosum is made up of 250-800 million fibers that connect the two halves of the brain together and coordinates the processing between them (Berger, 2005, p. 200). It is the building block to more complex motor skills and expression. In other words the corpus callosum is what allows the left hand to know what the right hand is doing. Maturation of the corpus callosum can be witnessed by observing the drawings of “people” produced by children of different age groups. For example, children age two to three generally produce pictures which more closely resemble a tadpole than a person. They usually draw a circle with dots for eyes and a line underneath for the body. By age five they typically expand this “tadpole” to including a torso. After age five the drawing includes arms and hands (Berger, 2005). This progression from tadpole to stick figure directly corresponds with the maturation of the corpus callosum and the improvements in motor skills that maturation brings. Improvements in motor skills are evident in almost everything a child does. As the brain becomes more mature and better able to coordinate the left and right hemispheres, the movements of the child become more complicated. Now, imagine trying to ride a bicycle if you could not synchronize the movements between the left side of your body and your right. This is what the...
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...king penguins, which live in Antarctica, warm their eggs by resting them on top of their feet. 8. Many snakes begin life in eggs too, but snake eggs are tough and leathery rather than hard and brittle. 9. A snake called the Indian rock python lays between 50 and 100 eggs at a time. 10. Since snakes are cold blooded, the mother rock python has to twitch her muscles to create heat. 11. During the two months it takes for the eggs to hatch, the mother python stays in one place and dose not even eat. 12. Frogs lay their eggs in jelly – like clumps along the edge of a pond. 13. Mother frogs do not take care of their eggs. 14. When a baby, or tadpole, hatches, it doesn’t look anything like an adult frog. 15. It has a tail, it has no legs or eyes, and it is completely helpless. 16. The tadpole grows legs, its tail begins to shrink, and it looks more and more like its parents. 17. Some baby animals do not hatch from eggs. 18. Mammals differ from other kinds of animals in other ways as well. 19. They are warm blooded, they usually have hair or fur, and their babies are fed with milk that comes from the mother. 20. Kangaroo babies are less than I inch (2.5 centimeters) long when they are...
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...threat to the environment as well; they may be causing a negative affect to the biodiversity of their habitats. The bullfrog is preying on any animal that they can fit into their mouths, which means that those animals are becoming extent in certain habitats. The bullfrog also releases larvae that has a negative impact on algae, which affects the entire aquatic community. The american bullfrog has a very interesting means of reproduction, the female bullfrog discharges eggs, normally into water, then the male bullfrog spreads sperm onto all of the eggs. This type of bullfrog has a very high rate of reproduction, one of the highest in frog species. The tadpoles, that come from the eggs the female lays, will emerge out of their eggs within one week. The water temperature of where the eggs were laid determines how long is takes the tadpoles to transition into adults. The female bullfrog is larger in size and weight than the male bullfrog. Bullfrogs are one of the most intriguing aquatic invasive species to learn about. Bullfrogs got their name because the male bullfrog makes a high pitched, cow like sound. The american bullfrog hibernates during winter, they bury themselves in mud to stay warm until the weather becomes warmer. The male bullfrog is very aggressive and territorial towards intruders and predators. The american bullfrog is a cannibal, they eat members of their own species. ...
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...gray when they hatch. Their shell will have orange spots on it. The snake-necked turtle is not considered threatened at this time. Turtles are usually very peaceful creatures that mind their own business. The snapping turtle is the exception. The snapping turtles scientific name is Rachelle Serpentine. The snapping turtle is usually 8 to 18 inches long. Snapping turtles feet are webbed, and their tails are long compared to most turtles. They are usually a dark color. Their jaws are hooked and very powerful. When snapping turtles are on land, they are very aggressive. When they are in the water, they usually keep to themselves. The snapping turtle will look for food underwater during the day. They eat seaweed, fish eggs, tadpoles, insects, leeches, snails, worms, baby ducks. Dead animals and baby mammals. They usually stay on the surface at night. When snapping turtles are underwater, they will bury themselves, and only their nose and eyes will be visible. This is why they often surprise their prey. The snapping turtle's shell does not cover part of their underside, so this is a vulnerable...
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...skin of the frog is glandular, with secretions ranging from distasteful to toxic. Warty species of frog tend to be called toads but the distinction between frogs and toads is based on informal naming conventions concentrating on the warts rather than taxonomy or evolutionary history; some toads are more closely related to frogs than to other toads. Frogs' skins vary in colour from well-camouflaged dappled brown, grey and green to vivid patterns of bright red or yellow and black to advertise toxicity and warn off predators. Frogs typically lay their eggs in water. The eggs hatch into aquatic larvae called tadpoles that have tails and internal gills. They have highly specialized rasping mouth parts suitable for herbivorous, omnivorous or planktivorous diets. The life cycle is completed when they metamorphose into adults. A few species deposit eggs on land or bypass the tadpole stage. Adult frogs generally have a carnivorous...
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