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What phylum of animals has radial symmetry?

Radial symmetry helps the sessile members of Phylum Cnidaria to feed. Because they do not move around to different places in order to feed, they need to be able to reach food from a fixed position. These animals' radial symmetry allows them to capture food from every direction.

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What makes crystals grow?

The process of nucleation can be either assisted or unassisted. Unassisted nucleation occurs when the process of crystallization starts with the molecules themselves, whereas assisted nucleation occurs on a solid surface. In assisted nucleation, solute molecules encounter a solid surface and attach to it.\nCrystals can form in all parts of the world, from the surface to deep within the earth. They can even grow from vapors that are rich in mineral content. For example, sulfur often forms in volcanic areas due to the phenomenon of hot gases encountering cooler surroundings and depositing crysta..

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What are magnets used for?

Magnets are also used in a variety of medical and veterinary applications. Magnetic resonance imaging uses magnetic fields to view internal organs, and electromagnetic fields promote the healing of broken bones. A similar treatment prevents bone loss in astronauts outside of Earth's gravity.\nIn veterinary medicine, magnets are used to treat hardware disease in cows. The condition occurs when cows swallow metal objects, which can puncture their organs. Cows can be fed magnets as a preventative; any metal objects swallowed will be drawn to the magnet instead of puncturing the cow's st..

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Is silicon a metal or nonmetal?

Silicon is part of group 14 on the periodic table, which is considered a metalloid group. The group includes carbon, germanium, tin, lead and flerovium. Out of this group, carbon is the only one considered a full nonmetal.Silicon has many of the aspects of metal, meaning it bends but does not break, does well under heat, is malleable, has luster and has a high melting point. The lack of conductivity in silicon keeps it from being fully classified as a metal.While silicon is the second most abundant element in the Earth's crust, it is harder to find as a pure free element. It is mostly fou..

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What colors go with brown?

White enhances the color brown by lightening the overall color of the room. Blue enhances brown because the cool tones of the color blend well with warm brown tones. Pastel colors, such as pink and blue, add sophistication to rooms.\nYellow is another color that adds warmth to rooms, especially when combined with brown shades, such as tans, taupes and medium-tone browns. The deep tones in purple add depth and a touch of sophistication to rooms. Purples that are less saturated and those that have gray undertones complement brown cabinets and furniture as well.\nCombining green and blue accents ..

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How do protists reproduce?

Protists are subdivided into four groups: protozoa, unicellular algae, slime molds and water molds.\nAll are eukaryotic, meaning their cells contain a nucleus enclosed by a membrane. While they are classified separately, scientists believe the various types of protists paved the way for the evolution of early plants, animals and fungi. Eukaryotic organisms first appeared more than 1.5 billion years ago. Scientists believe the first eukaryotes were protists, and that they reproduced asexually. The simplest form of asexual reproduction is binary fission, where a single DNA molecule replicates an..

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What is the main function of capillaries?

Capillaries function in a group, or a capillary bed, which is an interweaving network of capillaries. The more active a cell is the more capillaries that are needed to supply the proper blood flow and exchange of materials. These blood vessels are microscopic, but their presence is viewable at times. When a person blushes, this occurs in the capillaries and turns the cheeks red. This is partially possible because the wall of the artery is only one cell thick.

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What represents a negative impact of technology?

Overuse of technology, which is increasingly common, isolates people from each other. Although they communicate via computers and phones, they spend less time talking to each other in person. As a result, they slowly lose their ability to notice and understand emotional cues. Especially among youths, this can hinder the development of social skills and compassion, which can lead to narcissism and even cruelty, suggests the American Psychological Association.\nTechnology distracts from reading, exercise, outdoor play and other creative activities, as well as face-to-face socializing, says the I..

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How many glands does the human body have?

The glands found in the human body are responsible for everything ranging from allowing mothers to breastfeed their young to ensuring that body temperature can be more effectively regulated. According to the University of Cincinnati, the body's endocrine system is responsible for hormone regulation, managing blood glucose levels and protecting organs and tissues from external pathogens by ensuring an effective immune response to viruses and bacterium.

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What types of gases are there?

Some examples of oxidizing gases include fluorine, chlorine, nitrogen dioxide and nitric oxide. The inert gases include argon, carbon dioxide, helium, neon, nitrogen and xenon. Common flammable gases include acetylene, ammonia, butane, hydrogen and propane.\nGases are one of three types of matter present on the Earth; the others are solids and liquids. Gases differ from solids and liquids in that their particles are more spread out than those in the other two phases of matter. Gas particles contain a lot of energy and move in random ways. Gas particles have the ability to fill a container of a..

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