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lesantik [10]
3 years ago
7

The chemical name for sand Is silicon dioxide. The 2 elements found in a sample of the sand are blank and blank

Biology
2 answers:
Tatiana [17]3 years ago
7 0

Answer:

Explanation:

Silicon and oxygen

Nuetrik [128]3 years ago
4 0

Answer: The two elements found in sand are silicone and oxygen.

Explanation:

Sand is a granular substance that contain different smaller pieces of rocks and minerals. It is formed fromm weathering of rocks or breakdown of larger particles of rock into smaller pieces. Silicon dioxide or silica is a compound found in sand and also glass. Silicon dioxide is the chemical formula of sand. Silicon dioxide is formed when silicone reacts with two molecules of oxygen to form silicon dioxide. The major elements in sand is silicone and oxygen.

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Where does the electron transport chain occur?
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Inner membrane of mitochondrion
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When one atoms electron is given up to another atom both atoms become what?
Amiraneli [1.4K]
When an electron<span> moves from </span>one atom<span> to </span>another<span>, </span>both atoms become<span> ions.</span>
4 0
3 years ago
What is free nitrogen?
UNO [17]

Answer:

Nitrogen thet cannot be used by organisms. C.

Explanation:

Free nitrogen is simply molecular nitrogen (N2). Nitrogen, in its molecular form, consists of two nitrogen atoms bound together with a tripple bond. Because it is very stable, N2 is typically nonreactive, and takes a lot of energy to break them apart. Among these are the amino acids necessary for life to begin and which are the building blocks DNA is made from. Basically, any nitrogen that is in an organic compound is considered “fixed” nitrogen and N2 is considered to be “free” nitrogen

5 0
3 years ago
Read 2 more answers
A gene on human chromosome 15 is expressed throughout the body. However, in the brain, only the maternal copy of the gene is exp
lord [1]

Answer:

C) Through genomic imprinting, methylation regulates expression of the paternal copy of the gene in the brain.

Explanation:

The pattern of gene expression wherein either paternal or maternal gene is expressed in specific cells while the other one is prevented from expression is known as genomic imprinting.

In the given example, the maternal copy of the gene on chromosome 15 is expressed in brain cells while its paternal copy is not expressed in these cells. Hence, the pattern of expression of this gene is regulated through genome imprinting. One of the mechanism is methylation of cytidine residues of CpG islands of the DNA that are more frequently present within promoters of the genes.

When the cytidine residues of these sequences are methylated into 5-methylcytidine, the transcription factors do not bind to these promoters preventing the expression of these genes.

Hence, methylation of cytidine residue in CpG islands of the promoters of the gene present on chromosome 15 could have silenced its expression in brain cells.

6 0
3 years ago
How is fresh water collected in the rain forest?
uranmaximum [27]

Answer:

if you mean how you can gain water in the rainforest?

Kindly, look at below ^_^

Explanation:

The role of rainforests in the water cycle is to add water to the atmosphere through the process of transpiration (in which plants release water from their leaves during photosynthesis). This moisture contributes to the formation of rain clouds, which release the water back onto the rainforest.

Water Basics

 

The first thing you should do if you're stranded in the wild is find a source of drinkable water. The most obvious sources are streams, rivers and lakes. Animals always know where the water is, so be on the lookout for wildlife or animal tracks. Lush green vegetation is also a sign that water is nearby. Swarming insects may be a hassle, but they also signal that a water source isn't far away. Bird flight paths in the morning or evening can point you in the right direction. Stay on the move until you find a water source. When you pause to rest, use your ears -- rivers can be heard in the quiet woods from great distances. Remember that water always flows downhill, so low-lying areas and valleys are a good bet.

If you find a muddy area, there may be groundwater available. Dig a hole about a foot deep and one foot in diameter and wait. You may be surprised to find that the hole is soon filled with water. This groundwater will be muddy, but straining it through some cloth will clean it up, and it will get you by in the short term. It's crucial to remember that any time you drink found water without purifying it, you're taking a risk.

HOPE THAT ASSESS YOU ...

4 0
3 years ago
Read 2 more answers
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