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Where do echinoderms live?

Members of the phylum include sand dollars, sea urchins, sea cucumbers, starfish and sea lilies. The invertebrates are found in all the world's oceans and at all depths, with most moving across the sea floor through vascular structures known as tube feet. While larvae may have bilateral symmetry, adults are radially symmetric, with appendages pointing outward from the center of the body. Many echinoderms have the ability to regenerate, or grow new limbs that are lost from attacks by predators. The echinoderm diet consists of barnacles, clams, mussels, snails, sea urchins and a variety of ..

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How can the prognosis for blood clot in the lung be improved?

Pulmonary embolism typically consists of multiple clots over a period of time, explains Mayo Clinic. It is rare that one clot alone causes the condition. Preventing deep vein thrombosis, or DVT, is the best way to prevent this condition because DVT is its primary cause. DVT occurs when blood clots form in the legs, or rarely, in another part of the body. Venous thromboembolism is the name of these two conditions occurring together.\nDVT occurs most frequently during the bed rest following surgery or during periods of sustained sitting, reports Mayo Clinic. Hospitals employ a number of methods ..

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Where are your biceps?

WebMD explains that the biceps muscle is connected to the bones of the arms by tendons, which are a kind of connective tissue. These tendons, which attach the biceps to the joints of the shoulders, are referred to as the proximal biceps tendons. The tendons connecting the biceps with the radius and ulna or the bones of the forearm are known as the distal biceps tendons. When the biceps muscle contracts, the forearm is pulled upwards.

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Is it the North or South Pole that has no land under it?

Since the North Pole does not have a land mass beneath the ice, it has no permanent buildings, and it is not considered a part of any continent. Unlike the North Pole, the South Pole has a permanent land mass existing beneath it that is covered by several feet of ice. This landmass is located in the southern continent of Antarctica.

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How many types of flowers exist?

In 2010, botanists from the United States, the United Kingdom and other countries began counting the number of flowering plants that have been identified. Scientists have been identifying and classifying flowers for centuries and during that time, many have been named more than once, because many scientists didn't realize the plants had already been named. During this process, many plants were added or removed from the list of endangered plants, or those faced with the possibility of going extinct.

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What color is a luminous flame?

The flame is yellow because of its temperature. To produce enough soot to be luminous, the flame is operated at a lower temperature than its efficient heating flame. The color of simple incandescence is due to black-body radiation: as the temperature decreases, the peak of the black-body radiation curve moves to longer wavelengths. Other factors, particularly the fuel chemistry and its prevalence for forming soot, have an influence on luminosity.\nThe Victorian chemist Edward Frankland studied luminosity in flames and discovered that their luminosity also increased with pressure.

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What happens when waves travel through a gap?

The amount a wave spreads out or bends in response to an obstacle in its path depends on the wavelength of the wave and the size of the gap in the obstacle. Waves that have a longer wavelength can bend more than shorter waves. For example, sound has a larger wavelength than light, so it can bend more than light. This is why it's possible to hear people talking in an adjacent room even if they cannot be seen, because the sound waves of their voices can bend around the wall but the light from them does not bend sufficiently. The size of the gap in the obstacle also determines how much the w..

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How many variables are in a controlled experiment?

To avoid experimental error, all factors other than the dependent and independent variables are standardized and referred to as controlled variables. For example, an experiment that measures the time it takes for a candle to burn down would control variables such as wind and type of candle by conducting the test in the same windless area with the same kind of candles. The independent variable for this example is the amount of time, while the dependent variable is some other measurable aspect such as height that notes the change in the candle as it burns.

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What happens in autumn?

The autumn equinox signals the first day of autumn. During autumn, the sunrise and sunset are approximately 12 hours apart everywhere in the globe. In the United States, many schools and universities have autumn terms, a time in which children, teenagers and young adults go back to school. Thanksgiving and Halloween are highly anticipated events during this season. Thanksgiving is traditionally observed to celebrate a bountiful harvest, and crops, such as pumpkins and apples, are harvested and used for soups, pies and Jack-o-lanterns.\nLeaves of deciduous trees change colors in autumn and star..

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What is the molar mass of propanol?

To determine the molar mass of the chemical compound C3H8O, add the molar masses of the atoms in its chemical composition. To determine the molar masses of individual elements in propanol, consult the Periodic Table of the Elements, as the molar mass of every atom is shown in it. One molecule of propanol consists of three carbon, eight hydrogen and one oxygen atoms with molar masses of 12.01, 1.008 and 16.00 g/mol, respectively. Adding the masses, (3x12.01)g/mol, (8x1.008)g/mol and 16g/mol, yields 60.09g/mol, the molar mass of propanol.

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