Can crayfish have babies without mating?

Can crayfish have babies without mating? Every marbled crayfish is female—and they reproduce by cloning themselves. They were all female, and they all laid hundreds of eggs without mating. These eggs, in turn, hatched into hundreds more females—with each one growing up fully able to reproduce by herself. Many baby crayfish are eaten because they […]

Why does my AC keep switching to defrost?

Why does my AC keep switching to defrost? Heat, extreme cold and vibration of the engine and car’s suspension can cause component of the defroster to fail. In some cases an electrical motor can burn out or the gears inside the actuator can break causing the defroster door to get stuck. Why does my AC […]

How efficient is desalination?

How efficient is desalination? The desalination plant’s energy consumption per household per day represents about the same amount as a 4-star fridge. A hot water service would use nearly eight times as much energy as the desalination plant per household per day. Reverse osmosis is the most energy efficient method of desalination. Is desalination a […]

Did the iPhone 3G have a camera?

Did the iPhone 3G have a camera? Rear camera On the rear of the device, the iPhone 3G features the same fixed-focus 2.0 megapixel camera of its predecessor. This camera does not have optical zoom, flash, autofocus, or native video recording, although various applications became available to allow video recording on the device. Does Apple […]

Can somebody tell me or can someone tell me?

Can somebody tell me or can someone tell me? If you use the present tense you might say “People tell me” or “ People are telling me”, to say “There is a rumour” or “The word is going around” This implies that nothing is definite. If you have been told something by one person you […]

Which country won Eurovision in 1969?

Which country won Eurovision in 1969? France’s win was their fourth, thus making it the first country to win the contest four times. The Netherlands’ win was their third…. Eurovision Song Contest 1969 Musical director Augusto Algueró Directed by Ramón Díez Executive supervisor Clifford Brown Host broadcaster Televisión Española (TVE) Did Lulu win the Eurovision […]

Is unit vector always 1?

Is unit vector always 1? Because a unit vector, by definition, has a magnitude of 1, so if you want a unit vector in the direction of A you need to divide by its magnitude. What is the point of a unit vector? The only purpose of a unit vector is to specify the direction […]

How ve you been or how have you been?

How ve you been or how have you been? The difference is that “How are you?” is in the present tense. I want to know how you are doing RIGHT NOW. “How have you been?” is the present perfect tense. It means that I want to know what you’ve been doing since I saw you […]

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