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How do you remove chlorophyll from plants?

One of the common organic solvents scientists use to dissolve chlorophyll is acetone. The scientist begins by dipping the leaf into boiling water for a few seconds to a few minutes to stop other chemicals in the leaf from breaking down the chlorophyll. A student attempting this experiment as a science fair project should then cut the stems and veins from the leaf, saving the remaining tissue. The student then soaks the leaf material in pure acetone for several hours, until the solvent takes on a green color, indicating chlorophyll is dissolving from the leaves. Shaking occasionally speeds the ..

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Why is it important to save endangered animals?

When an animal goes extinct, it is gone forever. Even if people do not yet know the direct benefits a certain species offers, it is important to preserve that species to allow for further research. Within the food chain, predators help maintain balanced populations of other types of animals. This balance is important to produce the healthy vegetation and adequate water supplies, which humans rely on. If one species is lost, it can create a domino effect in the animal kingdom, which causes threats to other species' populations.\nSome protected animals are important to scientific research o..

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Does sound travel faster in solids, liquids or gases?

Sound travels in mechanical waves of energy through different media, such as solids, liquids or gases. Waves cause the molecules of a medium to collide as it passes through the medium. Because the molecules of a solid are closer together than those of a liquid or gas, the molecules of a solid collide at a faster rate. Altitude, humidity and temperature are additional factors that influence the speed that sound passes through a medium.

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What is sound energy?

Although sound vibrations produce energy, the total amount of energy for even very loud sounds is minimal. A loud train engine, for example, only produces about one hundredth of a watt per square meter. Compare this to energy that comes from sunlight hitting the earth, which is about 680 watts per square meter, and it is easy to see why sound energy is not a reliable means of generating power.\nThe higher pressure and more intense a sound is, the more energy it produces; as the amplitude of the waves increases, so do the perception of loudness and the total energy. Sound comes from the vibrati..

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Why does all my food taste salty?

The Mayo Clinic notes that changes in taste usually do not indicate a serious underlying problem, although they tend to impair a person's enjoyment of food. Dehydration causes salty taste due to insufficient fluid intake or too much fluid loss. Excessive alcohol or caffeine consumption causes fluid loss, leading to dehydration and saliva that is saltier than normal. A salty taste in the mouth is also a side effect of certain medications, such as chemotherapy drugs and anti-thyroid medications. Other potential causes are Sjogren's syndrome, bacterial infection of the salivary glands, ..

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What size is DL in envelopes?

Total Office Solutions indicates that international envelope size is based on the envelope's ability to accommodate an A-size sheet whose basic measurement is 917 by 1297 millimeters. These envelope sizes are classified as C-Series and include C3, which holds an A3 sheet, C4 which holds an A4 sheet, C5 which holds an A5 sheet and C6 which holds an A6 sheet. However, the DL envelope is different in that it doesn't hold any unfolded A-size sheet.

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What are the cell walls of fungi made of?

The fungal cell wall surrounds the fungal cell outside of the plasma membrane. Chitin, which is extruded by the plasma membrane, is the largest component of the wall. Glucans, a type of polysaccharide, give the wall rigidity. Proteins, particularly mannans, reside in the fungal cell wall and work as enzymes to synthesize more of the cell wall. The chitin in the cell wall helps scientists distinguish fungi cells from the cells of plants, bacteria and protists.

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How many milliliters are there in a pound?

A milliliter is a metric unit of capacity equal to 1/1000 of a liter and about 0.06 cubic inch. Milliliters are frequently used to measure small amounts of liquids such as water. A pound is a unit of weight or mass equal to 16 ounces or 7,000 grains. Pounds are frequently used to measure solid goods.

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How do spider plants reproduce?

Though the flowers of the spider plant are insignificant, they will produce seeds enclosed in capsules found on half-inch long stems if they are fertilized.\nHowever, it's far easier to propagate the plant from its plantlets. Ideally, the gardener should wait for the plantlets to develop roots and then be cut from the stolon. The stolon should then be cut back to the parent plant.\nThe plantlet should be placed in a cup of water that has been allowed to sit for 24 hours or so with its roots in the water and its leaves overhanging the edge of the cup. Water should be changed daily.\nIn the..

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What is the function of the abducens nerve?

The abducens nerve is a somatic efferent nerve that leads the brainstem near the pons and the medulla. It runs medial to the facial nerve and enters the subarachnoid space of the spine once it exits the brainstem. It then travels back upwards towards the eye socket in order to wrap around the eye and innervate the lateral rectus muscle. The abducens nerve's long journey to the eye makes it very vulnerable to injury and damage.

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