What was the first animal to orbit the earth? NEED HELP ASAP

1 answer:

7 0

Dog Laika:

Hurriedly prepared to take advantage of the propaganda value of the first satellite, Sputnik 2 utilized an animal habitat and carried the dog Laika, the first animal to orbit the Earth. The event began to galvanize the United States into organizing their space program.Nov 6, 2017

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Why is the ability of the cell membrane to be "picky" important?

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Answer:

Hi there!

Your answer is:

It is very important for the cell membrane to be semi-permeable because the ability to pick and choose what comes in and out of the cell keeps the cell safe! The membrane can choose to block out nasty germs and can also choose to get rid of internal waste.

An example of when this is important is in this scenario:

Let's say the cells are in a really salty solution. Naturally, salt will want to pull the water out of the cell. If the membrane wasn't semi permeable, the water would listen to the salt and leave the cell. This would cause cell death. BECAUSE the membrane is semi permeable, they can choose not to give the salt any water, keeping them alive

Hope this helps

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The 30 million years ago, because its the closest one to us. Wait is there a picture to it ?

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The process by which a neurotransmitter is reabsorbed by the neuron that released it is termed:

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The answer is Reuptake.
Have a nice day :-)