The Question is in the picture

Answer:

O silicon (Si)

Explanation:

-Valence electrons are electrons of the outermost shell which can participate in chemical bonding. ... -As in silicon, four electrons are present in the outermost shell, so silicon has Four valence electrons.

Among the options given in the question, the element that has four valence electrons is known as Silicon. Thus, the correct option for this question is D.

Valence electrons may be defined as the number of electrons that are present in the outermost shell of an element. These electrons actively take part in chemical bonding due to the sharing and pairing of electrons.

The atomic number of beryllium is 4, it has valance electrons of two. Potassium has an atomic number of 19, it has a valence electron of one. Sulfur possesses an atomic number of 16, it has valence electrons of six. While Silicon has an atomic number of 14, its electronic configuration is 2, 8, and 4. So, it has valence electrons of four.

Therefore,  the element that has four valence electrons is known as Silicon. Thus, the correct option for this question is D.

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Answer:

through a process called cellular respiration

Explanation:

the state of change between mechanical to chemical in the body,to boost the body functions.

Answer:

Heterotroph is an organism that is unable to synthesize its own food,

they depends on autotrophs and others animal for their food

An autotroph is an organism that can make its own food by the

process of photosynthesis is called autotrophs

they get their food by photosynthesis

Answer:

Cellulose is a carbohydrate

Answer: it’s the second one

Answer:

request in what ????? xD

Answer:

The conditions that affect physical stability are heat, temperature, compression, pressure, and the molecular structure. The base of the intrusion is parallel to the rock layer beneath it.

Answer:

3rd Period

Explanation:

2nd period reviewed material with Mr. Doe

3rd period did NOT reviewed material with Mr. Doe

Experimental group is the group being affected.

Control group is the group not being affected.

Answer:

phloem

Explanation:

I am pretty sure that this is right and the xylem carries the water. I hope this helps!! I am sorry if it is worked wrong.

Explanation:

Having variation within a species means that if the environment changes there may be individuals within the species more able to withstand the change and survive.

Variation refers to the differences between members of the same species. There is usually extensive genetic variation within a population of organisms or a species.

The common emerald dove (Chalcophaps indica), also called asian emerald dove and grey-capped emerald dove, is a widespread resident breeding pigeon native to the tropical and subtropical parts of the Indian Subcontinent and Southeast Asia, the dove is also known by the names of green dove and green-winged pigeon. The common emerald dove is the state bird of the Indian state of Tamil Nadu. The Pacific emerald dove and Stephan's emerald dove were both considered conspecific.

Answer:

observation : a toaster doesn't work

question : is something wrong with the electrical outlet

hypothesis : something is wrong with the outlet my coffee maker also won't work and plug into it

experiment : I plug my coffee maker into the outlet

result : a coffee maker works

2nd result : my toaster is broken

Explanation:

pls mark me branilest

Answer:

A: serine, tryptophan, serine, valine

Explanation:

Hi there!

Protein Synthesis is the process where proteins are created from DNA.

We are given the mRNA strand AGUUGGUCUGUA, as well as a provided chart

The mRNA strand is created out of nucleotides (each of the letters is one nucleotide in the code), which will code for a specific chain of amino acids, creating a protein.

Each amino acid is made up of 3 nucleotides. This sequence of 3 nucleotides is called a codon.

So we can break up the code into groups of 3, to make identifying the codons easier.

AGU UGG UCU GUA

Now we need to figure out which amino acid each codon codes for. Thankfully, we were given a chart that can help us with that.

The chart is read where the first base is on the left, and is vertical. The second base is in the center, yet is horizontal. The third base is on the right, and is also vertical.

Let's start with the first codon, which is AGU

The first base is A. The second base is G, and the third base is U. So the first amino acid is serine (ser)

The second codon is UGG.

The first base is U, the second base is G, and the third base is G. So the second amino acid is tryptophan (trp)

The third codon is UCU

The first base is U, the second base is C, and the third base is U. So the third amino acid is serine (ser)

The fourth codon is GUA

The first base is G, the second base is U, and the third base is A. So the fourth amino acid is valine (val).

That means the amino acid sequence from the mRNA code is: serine, tryptophan, serine, valine. The answer is A

Hope this helps!

DNA replication occurs only in 5'-3'. Option C. Okazaki fragments are best described as short segments of replicated DNA formed on the lagging strand.

During DNA replication, the molecule unwinds and the two strands get separated.

Different enzymes and proteins are involved in the replication fork formation, such as helicase (enzyme needed to break hydrogen bonds and separate the two original strands) and topoisomerase (enzyme that releases tension).

DNA polymerase makes the new nucleotides enter the fork and pairs them with the corresponding nucleotide of the original strand. Adenine pairs thymine, and cytosine pairs guanine.

Since DNA strands are antiparallel and replication occurs only in 5'-3' direction, one of the strands will replicate continuously, while the other strain will be replicated by short fragments known as Okazaki fragments.

Okazaki fragments are only formed on the lagging strand.

According to this framework, the correct option is C. short segments of replicated DNA formed on the lagging strand.

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Answer:

carbohydrates, lipids, proteins, and nucleic acids.

"sugar"

Explanation:

The squirrel had a larger brain and is smarter. I say this because the squirrel has to be smart enough to gain a large amount of nuts, hide those nuts from others, and remember where those nuts are. On the other hand, the mole is less smart bc it is primarily underground. The mole's location underground helps to keep it safe from other predators so it doesn't have to worry too much about that. the mole also can't see which means that sight isn't of enough importance to keep.

Answer:

e. All of these

Explanation:

blood is suspension, mixture and even a solution

Answer:

The force that pulls planets towards the Sun is called gravity.

Answer:

A). Vacuoles B). Cytoplasm C). Rough Endoplasmic Reticulum D). Cell membrane

Explanation:

The plant has the largest vacuole than animal cells. The cytoplasm is mostly composed of water, salts, and proteins. It is one out of 2 types of endoplasmic reticulum, characterized by the appearance of the ribosomes that give it a grainy appearance. The cell membrane is made of millions of smaller molecules that create a flexible and permeable container.

Answer:

Congress imposed the 55-mph limit in 1974 as a fuel-conservation measure, which it is; federal officials estimate it conserves about 9 million gallons of gasoline a day. ... The best estimate is that it has helped save the lives of about 36,000 people in the last five years

A solvent is a substance present in a greater concentration than solutes (Option D).

In conclusion, a solvent is a substance present in a greater concentration than solutes (Option D is correct).

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Answer:

Retina: membrane at the back of the eye that changes light into nerve signals.

lens focuses light rays onto the retina

Mineral is a naturally occurring, inorganic solid that has a crystal structure & a definite chemical composition.

Answer:

Explanation:

It's false

Answer:

homeostasis

Explanation:

Answer:

When the process of freezing occurs within water, the air molecules within the hydrogen bonds will attract other oxygen bonds, creating a less dense substance.

Explanation: