The components of the scientific argument are

expeople1 [14]

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3 years ago

1. A neuron fiber that sends a signal from your hand to your brain is called a _______.

tangare [24]

The answers are following
1)a
2)a
3)d

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Drag the words to complete the sentences.

lina2011 [118]

The Replication process in eukaryotic and prokaryotic cells is quite similar. Almost the same enzymes are involved. 1)eukaryotic, 2)multiple, 3)circular.

<h3>What is the prokaryotic DNA replication process?</h3>

In prokaryotic cells, DNA Replication consists of the unwinding and opening of the double-stranded DNA molecule, a process that starts at the replication origin.

The process is completed in three stages,

⇒ Initiation, in which helicase and topoisomerase are the first enzymes involved.

Helicase works in the replication origin.

It separates the DNA into two strands allowing the replication fork to advance by unwinding the DNA.

It breaks hydrogen bonds between nitrogenated bases pairs.

Topoisomerase impedes the DNA double helix near the replication forks to get too coiled when the DNA is opening.

⇒ Elongation, in which DNA polymerase I and III, primase, and ligase act,

Polymerase I and III are responsible for DNA elongation.

They are in charge of adding nucleotides to the growing chain, from 3' to 5' extremes.

It includes only nucleotides that complement the original strand.

They need to recognize a primer to begin.

The new chain grows in 5’-3’ direction

Primase is in charge of synthesizing primers.

DNA polymerase I eliminate ARN primers and substitute them with DNA.

DNA ligase seals the gaps that remain after replacing the primers.

⇒ Mistakes correction

Endonuclease cuts the wrong segment

Polymerase I and III are in charge of correcting errors and filling empty spaces.

Ligase seals the corrected extremes.

The prokaryotic replication result is two DNA molecules, each of them carrying an old strand and a new strand.

<h3>What is the eukaryotic DNA replication process?</h3>

Eukaryotic DNA replication is the process through which DNI molecule duplicates. This event takes place during the S stage of the interphase. So when the cell divides during mitosis or meiosis, each cell will get a complete set of chromosomes.

DNI replication is semi-conservative because each new molecule carries an original DNI strand and a new one. The fact that the new molecule is composed of an original strand makes it semi-conservative. The old existing strands are used to synthesize the new complementary strand.

The main difference concerning the prokaryotic replication process is that in eukaryotic cells there are

5 different polymerase enzymes
several replication origins per chromosome
involves histones

The origin of the replication requires

The helicase enzyme breaks hydrogen bonds and separates the two original strands.

The topoisomerase enzyme is necessary to release tension.

Other proteins are also needed to join the strains and keep them separated.

Once the molecule is opened, there is a region named replication forks.

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.

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

Primers are needed to make the DNA polymerase work. Primers are small units of RNA and are placed at the beginning of each new fragment. These are later eliminated by Polymerase.

Ligase seals the gaps.

Complete sentenses

Before a cell divides, its DNA must be replicated without errors so that the genetic codes for proteins are expressed properly. In eukaryotic cells, which have linear chromosomes, replication occurs in multiple locations and ends when all the chromosomes are copied. In prokaryotic cells, which have circular DNA, replication starts in only a single location and proceeds until the entire chromosome is copied.

You can learn more about replication process in prokaryotic and eukaryotic cells at

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CAN YOU PLEASE HELP! This boulder is found in Wales in an area that was once covered by a glacier. When the glacier retreated it

horrorfan [7]

Answer:

C

Explanation:

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3 years ago

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1. Studies conducted in England during the Industrial Revolution have shown that children born to poor families were, on average

yKpoI14uk [10]

1. The most likely explanation for this difference in height is a difference in nutrition because rich families have a better lifestyle than poor families.
2. The disease must be recessive because there is a window diagram of people who inherit the genetic disease.
3. A farmer chooses the cows in his or her herd that produce the most milk and breeds only those cows. The explanation in this is the group of cows that produce the most milk are probably the ones who have the link of family lineage between them. Breeding of healthy cows produces also healthy cows thus healthy cows will be breed to each other.
4. Increasing the amount of crop harvested should be the advantage of the farmer. Increase of the amount of crop harvested means increase of the farmer's income.
5. D. Blastocyst > zygote > embryo > fetus. Blastocysts are structures that formed early in day 5 of in-vitro fertilization process which will be transformed later into zygote. The zygote will undergo in a division process called mitosis and after the first eight weeks of fertilization, embryo will be formed. Bodily or organ structures will then appear and after this development by twelfth week of fertilization, fetus will be formed and this will be the last stage of development that includes growth.
6. The new cell that is formed from fertilization is called zygote. This eukaryotic cell is produced from joining of two gametes together.
7. Egg-laying land animals have evolved to produce eggs with tough shells to ensure that external fertilization can take place with caution and safety. Tough shells are needed to protect the cell that undergoes fertilization.
8. Plants and animals reproduce in different ways but they both carry hereditary material from parent. Genes from their origins are carried and the appearance of some trait will be shown by the offspring.
9. There is a 50% that the second offspring will be a girl. It really depends on the genetic material and biological character of the mother and there are factors that needs to be checked upon giving birth.
10. One of the plants has the nutrients and light it needs to grow and flower, while the other does not. The environment is similar between the two plants but the manner or means of taking care of it depends on the people who own it. This also affect the access of the pollinator to the flower if a flower does not have any nutrients to give.
11. Over time, a plant pollinated by a hummingbird has developed very long, tube-like flowers. The longer, tube-shaped flowers probably developed to keep the hummingbird from reaching and drinking the flower’s nectar. Birds are creatures who flies high and the for them to reach the flower's nectar, the plant should also be high.
12. Pollen inside the cherries fertilizes ovules, which produce seeds. This helps to reproduce the plant of cherry trees because seeds are the source and without seeds there would be no plants or trees to grow.
14. A plant that reproduces with flowers is called angiosperm with a scientific name of magnoliophyta, subkingdom of embryophyta.
15. At certain times of the year, the male sage grouse can be seen inflating the air sacs on his chest and singing loudly to a female sage grouse. This behavior is likely an example of a courtship ritual practiced or acted by the nature of male animals. The male animal are would try to impress the female animal by showing off their talent or giving them anything to offer for an intercourse.
16. In humans, the developing embryo receives nutrients and oxygen through a tube called the umbilical cord. This tube is connected between a mother and a fetus inside the mother's body. The nutrients received by the mother will also be received by the neonate by means of infusion or absorption through the barrier.

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4 years ago