How are most flowers pollinated? Usually plants rely on animals or the wind to pollinate them. When animals such as bees, butterflies, moths, flies, and hummingbirds pollinate plants, it’s accidental. The wind picks up pollen from one plant and blows it onto another. Plants that are pollinated by wind often have long stamens and pistils. […]

What is the correct sequence of events in DNA replication? Replication occurs in three major steps: the opening of the double helix and separation of the DNA strands, the priming of the template strand, and the assembly of the new DNA segment. During separation, the two strands of the DNA double helix uncoil at a […]

In which type of symbiosis does one benefit and one is harmed? Mutualism is a symbiotic relationship in which both species benefit. Commensalism is a symbiotic relationship in which one species benefits while the other is not affected. Parasitism is a symbiotic relationship in which the parasitic species benefits while the host species is harmed. […]

Which pair of magnets will attract each other? Every magnet has both a north and a south pole. When you place the north pole of one magnet near the south pole of another magnet, they are attracted to one another. When you place like poles of two magnets near each other (north to north or […]

How did Measles become infectious to humans? Measles is an airborne disease which spreads easily from one person to the next through the coughs and sneezes of infected people. It may also be spread through direct contact with mouth or nasal secretions. Where did measles come from originally? A recent study suggests that it appeared […]

Does helium have chemical properties? A chemical property is a property of the substance that becomes evident during, or after, a chemical reaction. Helium does not react with any other substances, thus the substance’s internal structure is never greatly affected and thus helium cannot have any chemical properties. What chemicals are in helium? Helium is […]

How does one become a blood stain analysis expert? To be certified you must also have at least three years of experience in bloodstain pattern identification. In addition, you must complete a 40-hour photography workshop and training in other aspects of forensic investigation such as crime scene investigation technology and evidence recovery. How many blood […]

How do nanoparticles target cancer cells? To make sure they can target cancer cells, the particles can be equipped with an antibody that recognizes a receptor expressed only on cancer cells. The scientists injected the nanoparticles into the brain and applied a low frequency, rotating magnetic field. How nanoparticles interact with cancer cells? Nanoparticles Decrease […]

When you hear any sound what vibrates and how are the vibrations then transferred to the inner ear? The eardrum vibrates. The vibrations are then passed to 3 tiny bones in the middle ear called the ossicles. The ossicles amplify the sound. They send the sound waves to the inner ear and into the fluid-filled […]

Why is seawater desalination so expensive? Desalination, the process of removing salt from water, is expensive. One common desalination method, reverse osmosis, is expensive because it requires a great deal of electricity to push water through a filter. It’s also costly to treat the water to kill microbes and to replace the filters. How much […]