What plant and animal cells have in common? Animal cells and plant cells share the common components of a nucleus, cytoplasm, mitochondria and a cell membrane. Plant cells have three extra components, a vacuole, chloroplast and a cell wall. What is unique to plant cells? The plant cell has a cell wall, chloroplasts, plastids, and […]
Is all green glass uranium?
Is all green glass uranium? Perhaps the most reliable way to identify the presence of uranium in the glass is to expose it in the dark to a source of ultraviolet light (e.g., a black light). If the glass glows a rich green color, it contains uranium. Why is depression glass called depression? Depression glass […]
What types of combustion are there?
What types of combustion are there? Here’s a closer look at five types of combustion: Complete Combustion. Complete combustion requires a combination of fuel and oxygen. Incomplete Combustion. Incomplete combustion occurs when there is not enough oxygen for the fuel to fully react. Rapid Combustion. Spontaneous Combustion. Explosive Combustion. What three things are needed for […]
How many histones are in a nucleosome?
How many histones are in a nucleosome? eight proteins Do histones organize DNA? ‘Sticky’ histones keep DNA organized, but it takes a team of proteins to get them into the nucleus without causing a tangle. Cells contain two meters of DNA which, if left to its own devices, would soon end up in a knot. […]
What is the value of horizontal acceleration?
What is the value of horizontal acceleration? The horizontal velocity of a projectile is constant (a never changing in value), There is a vertical acceleration caused by gravity; its value is 9.8 m/s/s, down, The vertical velocity of a projectile changes by 9.8 m/s each second, The horizontal motion of a projectile is independent of […]
Who has lived in Windsor Castle?
Who has lived in Windsor Castle? Her Majesty The Queen Are there tunnels under Buckingham Palace? A series of secret tunnels run beneath Buckingham Palace. When the Queen Mother and King George VI descended into the tunnels, they apparently met a man from Newcastle living in the tunnels. The palace garden is the largest private […]
What factor does not affect the total stopping distance of a vehicle?
What factor does not affect the total stopping distance of a vehicle? Visibility is one of a number of factors that do not affect your braking distance per se but can inhibit your thinking distance. The longer it takes for you to spot hazards in the road, the more time will have passed before you […]
What activates and deactivates the electromagnet?
What activates and deactivates the electromagnet? Electromagnets Can Be Turned On and Off When the electrical current is active, the electromagnet produces a magnetic field. When it’s not active, the electromagnet doesn’t produce a magnetic field. After lifting the load and moving it to a different area, a worker may deactivate the electromagnet to release […]
How does a dimming mirror work?
How does a dimming mirror work? Technology. In auto dimming mirror technology, a forward-looking sensor detects low ambient light from headlights behind the car and directs the rear-view sensor to look for glare. The mirrors darken automatically in proportion to how bright the glare is, then clear once the glare is no longer detected. Why […]
What are pollutants give example?
What are pollutants give example? These are those which are emitted directly from the source and persist in the form in which they were added to the environment. Typical examples of pollutants included under this category are ash, smoke, fumes, dust, nitric oxide, sulphur dioxide, hydrocarbons etc. What are the major sources of pollutants? The […]