What’s the difference between a gamete and a zygote?
A gamete is a mature, functional sex cell (i.e., an egg or sperm) that can unite with a gamete of the opposite sex.
A zygote is what results when the two gametes fuse.
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What is the largest U.S. city in land area?
It is not New York, Chicago, or Los Angeles. It is Juneau, Alaska, which covers 3,108 square miles. Los Angeles, in contrast, covers only 458.2 square miles.
When did dinosaurs become extinct?
Dinosaurs lived during the Mesozoic era, 225 million to 65 million years ago. By the end of that era, all Archosauria (or “ruling reptiles”), except crocodiles, had died.
How much does lightning heat the atmosphere?
An average bolt of lightning raises the air temperature along its way to about 50,000 degrees Fahrenheit.
Which U.S. federal agency employs the most people?
As of May 1988, the Department of Defense employed the most, with 1,066,805 civilian employees. The Copyright Royalty Tribunal employed the fewest, with seven.
What does it mean to galvanize steel?
To galvanize steel means that a zinc coating is applied, either by “hot-dipping” the steel in molten zinc or by electroplating it in an electrolytic process. Thus protected against exposure, galvanized iron or steel is less liable to rust.
What causes hail?
Hailstones begin as frozen raindrops or pellets of snow in a thunderstorm cloud. These “hail embryos” are carried by updrafts to a part of the storm where droplets of water exist in a supercooled state (that is, in liquid form at temperatures below freezing). These supercooled droplets freeze into ice when they strike the surface…