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VMariaS [17]
3 years ago
13

The cluster of developing cells from conception until birth is called an

Biology
1 answer:
AVprozaik [17]3 years ago
4 0

Answer:

The cluster of developing cells from conception until birth is called an embryo.

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33 need

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A new life form was discovered on Mars, one based upon Silicon instead of Carbon. Explain what properties Silicon has that allow
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Group IV of the Periodic Table of the Elements contains carbon (C), silicon (Si) and several heavy metals. Carbon, of course, is the building block of life as we know it. So is it possible that a planet exists in some other solar system where silicon substitutes for carbon? Several science fiction stories feature silicon-based life-forms--sentient crystals, gruesome golden grains of sand and even a creature whose spoor or scat was bricks of silica left behind. The novellas are good reading, but there are a few problems with the chemistry.

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CRYSTALLINE CREATURES? Silicon can grow into a number of lifelike structures, but its chemistry makes it unlikely that it could be the basis for alien life-forms.</span>

Indeed, carbon and silicon share many characteristics. Each has a so-called valence of four--meaning that individual atoms make four bonds with other elements in forming chemical compounds. Each element bonds to oxygen. Each forms long chains, called polymers, in which it alternates with oxygen. In the simplest case, carbon yields a polymer called poly-acetal, a plastic used in synthetic fibers and equipment. Silicon yields polymeric silicones, which we use to waterproof cloth or lubricate metal and plastic parts.

3 0
3 years ago
Please help me please!!!​
pantera1 [17]

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  1. nasal cavity
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5 0
3 years ago
For satre, the exercise of freedom carries what?
Dmitrij [34]

trapped in the questions

6 0
2 years ago
What is the dilution if 75 ml of diluent is added to 25 ml of a bacterial suspension?
vampirchik [111]
For the answer to the question above. I believe the answer to your question is <span>"75/100 = 3/4" is the dilution needed for a 75ml of diluent added to 25ml of bacterial suspension</span>.
I hope that my answer helped you. Have a nice day!
8 0
3 years ago
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