According to the direction of the arrow, place the images into the correct order to represent the activation of a T cell.

The activity of an enzyme might be increased by all of the following except the presence of other enzymes.

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Skeletal muscle fibers require neurotransmitter from neurons in order to be activated. Neurons must enter the endomysium structure to activate the myofiber.

Neurons are the fundamental constituents of the nerves also known as neurones or nerve cells. The cells known as neurons are responsible for receiving sensory data from the world, sending commands to our muscles, and converting and relaying electrical signals at various points along the road.

The two most common forms of neurons are synapses and glia, a non-neuronal cell type. There are 1 trillion cells and at nearly that many glia in the normal adult human brain. Glial cells are just as important for normal cognitive function as neuron, despite the latter being the most well-known type of brain cell.

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Answer and Explanation: Because the runner is running at a constant velocity, the velocity is not changing, this means the rate of change of velocity would be 0. So the answer is c) Their acceleration is zero.

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Answer:

Long/Yellow : 4, Long/Orange : 4, Short/Yellow : 4, Short/Orange : 4

Explanation: Use a punnet square.

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Because he is hemizygous, the man has only one allele of the X-linked characteristic.

Males have X-linked features that are hemizygous, which means that only one copy of the gene is necessary for the phenotypic expression of these traits.

Men are more likely than women to have X-linked recessive disorders. The X chromosome is unique to males. The condition is caused by just one recessive gene on that X chromosome. The male XY gene pair is made up of two genes, one on each chromosome of the Y chromosome.

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Answer: Pyridoxine

Explanation:

is needed (like some of the other B vitamins) for the breakdown of carbohydrates, proteins and fats. Pyridoxine is also used in the production of red blood cells, as well as in the biochemical reactions involved in the metabolism of amino acids (the building blocks of protein)

When mitosis is finished, a cell that had 12 replicated chromosomes at the beginning will still have 12 chromosomes.

If the cells have 12 chromosomes during interphase, they will still have 12 in each of their daughter cells even after mitosis is complete.

Meiosis is a cell division process in which a single parent cell divides twice to produce four daughter cells that each have half as much genetic material as the original cell. Therefore, if a cell has 12 chromosomes at the start of meiosis, then 12/2=6 chromosomes will be present in the cell by the completion of meiosis.

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Answer:

Probably 1, 6, and 5.  I'm guessing the answer is whichever ones don't have a nucleus

Explanation:

Binary fission is common among prokaryotes (cells without a defined nucleus)

Answer:

near the seafloor spread in the centers or mid-ocean ridges.

Explanation:

The earths crust is the outermost part of the earth

According to the notion of blending, blooms of all intermediate heights should result from crossing short and tall flowers.

Blending refers to the expression in offspring of phenotypic characteristics (such as pink flower color from red and white parents) intermediate between those of the parents as well as inheritance in a now-discredited theory in which the genetic material of offspring was held to be a uniform blend of that of the parents.

Blending is carried out before to spinning and is done to add desirable qualities like strength or durability, to cut costs by combining expensive fibers with less expensive varieties, or to generate specific color or texture effects. Blends are the term for materials constructed from such fibers.

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Answer:

Crossing over

Explanation:

crossing over

The smooth seed shape is QQ, Qq where the qq is the wrinkled seed shape. The condition is possible if the gametes are heterozygous then the condition is heterozygous.

The condition of heterozygous is that the two genes present on the  allele.

Punnett square shows the Qq X Qq that is QQ,qq,qQ, qq that is 2 of the progeny are recessive in nature and 2 are dominant in nature.

The ratio is 1:1 that is the the phenotypic ratio will be 1:1 where 1 represents the allele that is dominant in nature which represents smooth seeds and 1 represents wrinkled seeds that is qq which represents wrinkled as well.

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Hello.

(1) Cytoplasm: The cell substance between the cell membrane and the nucleus, containing the cytosol, organelles, cytoskeleton, and various particles. The cytoplasm is responsible for cell shape, material transport like genetic material and products for cellular respiration, and storage.

(2) Plasmid: A segment of DNA independent of the chromosomes and capable of replication, occurring in bacteria and yeast: used in recombinant DNA procedures to transfer genetic material from one cell to another. In other words, it is a small, circular, double stranded DNA molecule, which can replicate independently from its chromosomal DNA. If plasmids are used for experiments, they are called vectors. because genes in plasmids often provide the bacteria with genetic advantages, including for example antibiotic resistance.

(3) DNA in nucleoid: The nucleoid is the region of a prokaryotic cell that houses the primary DNA. The nucleoid contains the genomic DNA, and molecules of RNA and proteins. The main proteins of the nucleoid are: RNA polymerase, topoisomerases and the histone-like proteins: HU, H-NS (H1), H, HLP1, IHF and FIS.

(4) Plasma membrane: The plasma membrane is a thin, flexible boundary between a cell and its environment that allows nutrients into the cell and allows waste and other products to leave the cell.

(5) Cell Wall: The definite boundary or wall that is part of the outer structure of certain cells, as a plant cell. It acts as a skeleton for plants, protects the internal contents of the cell, and regulates cell growth.

(6) Capsule: A pure sample that lasts forever and can be used for testing at any time in the future has been created by extracting and purifying the DNA contained within the capsule to remove any damaging enzymes that may break down the DNA over time.

(7) Pilus: (Simple: Pili are used to transfer DNA and for attachment to surfaces.)

(8) Flagellum:  A long, hair-like, motile extension of the plasma membrane; in eukaryotic cells, it contains microtubules arranged in a 9+2 pattern. The movement of flagellum propels some cells through fluids.

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Epistatic interaction between alleles condition is always necessary for members of one population to be reproductively isolated from other populations.

Human Reproduction is when an egg cellular from a female and a sperm mobile from a man unite and develop inside the womb to form a infant. a number of organs and systems in both the female and the person are wanted so as for this procedure to occur. those are known as the reproductive organs and genitals.

Reproduction is the manner through which a dwelling being offers upward push to younger ones. duplicate approach to breed. it's miles a organic procedure via which an organism reproduces an offspring who is biologically similar to the organism. reproduction permits and guarantees the continuity of species, era after technology.

In the reproductive manner, a male sperm and a lady egg provide the facts required to provide another person. idea takes place whilst those cells be a part of as the egg is fertilized. being pregnant starts once the fertilized egg implants in the uterus.

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All four daughter cells will have a full chromosome set except two is the most likely effect on the four daughter cells.

With the exception of two daughter cells having an extra chromosome containing the Q or q allele and the other two without this chromosome, all four of the daughter cells will have a complete set of chromosomes.

Mitosis divides a parent cell into two identical daughter cells, in which each of which has the same amount of chromosomes. But, Meiosis, on the other hand, creates four distinct daughter cells, each of which has half as many chromosomes as the parent cell.

Half of the original 46 chromosomes, or 23 chromosomes, will be present in each daughter cell. There are two sister chromatids on each chromosome. The daughter cells now enter meiosis II, the third and last stage of meiosis.

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The reason it must aim for the fish in a slightly different place than where the fish appears to be located is option D: Light waves are refracted as they travel from air to water.

Light slows down when it transitions from less dense air into more dense glass or water. The light ray changes direction as a result of the slowing of the light. Refraction is brought on by a change in the light's speed.

We know that when light tends to bends away from the normal when it reaches the air, which is why the pelican must dive in front of the horizontally oriented image of the fish because of the law of refraction.

So, The angle at which the light exits the water from the fish bends it away from the normal, giving the impression that the fish is closer to the surface.

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See full question below

A pelican hunts fish in the water. As the pelican flies above the water’s surface, why must it aim for the fish in a slightly different place than where the fish appears to be located?

answer choices

Light reflects off the fish, except for light of the wavelength the fish absorbs, making the fish hard to see.

Water absorbs most of the light, so not much light reaches the pelican’s eyes.

Energy from the ocean waves is transferred to the light waves.

Light waves are refracted as they travel from air to water.

Answer:

we have 55 percent of muscle in . the lower bode

Answer: The Egyptians built a calendar that ended in 2012.

The answer is that is TRUE. They thought it was doomsday in 2012.

Hexokinase solely changes glucose into glucose-6-phosphate; it does not catalyse the breakdown of ATP. Due to this compatibility, hexokinase binds to glucose but not to water, and the structural change is necessary for hexokinase to become catalytically active.

Adenosine triphosphate is utilised and stored as energy at the cellular level (ATP). The structure of ATP, a nucleoside triphosphate, is made up of adenine, ribose, and three serially bound phosphate groups. A substance that can be used as a catalyst to accelerate a reaction without being consumed. Catalysts often reduce a process's activation energy or change its mechanism. Enzymes are proteins that function as catalysts in biological processes.

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In order to maintain homeostasis in the bitterly cold climate, polar bears slow down their metabolism in order to conserve heat.

In reaction to environmental changes, an organism can maintain internal stability through the process of homeostasis. The best illustration of homeostasis is the internal temperature of the human body.

The body's homeostasis keeps all cell activities and the activity of its enzymes operating at their optimum levels. Keeping a steady internal environment despite deal with the changing factors is what it means to maintain equilibrium. These include managing blood pressure and blood sugar levels in the human body.

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Kepler and Galileo are the two famous earth scientists. Kepler made the planetary motion laws public. Galileo observed faraway vegetation with the telescope.

Mt. St. Helens frequently referred to as the Mount Fuji of America, used to resemble a conical volcano. This was before it erupted in 1980. Earth science is the study of the four and a half billion years of biotic evolution, the structure, characteristics, and processes of the Earth. Understanding earth science helps us think globally and act locally.

Seismologists concentrate on quakes and other seismic (energy) events that might be dangerous to our safety. Geology is the fundamental study of the earth. Meteorology is the study of the atmosphere. Oceanography is the study of the oceans on Earth. Astronomy is the field of study of the cosmos.

The various tools scientists use to study the earth are compasses, rock hammers, hand lenses, and field books.

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compound including glucose The lac operon's expression is changed when the CAP protein attaches to the CAP site.

Bound RNA polymerase is assisted in binding to the lac locus promoter by CAP. There must be lactose available: The lac promoter will be freed from the operator if lactose is accessible by binding of allolactose. This enables the transcription of the operon by RNA polymerase to proceed on the DNA. Two distinct proteins govern the function of the promoter, which manages the lac operon's expression. One of the proteins stops RNA polymerase from trancribing (negative control), while the other improves RNA polymerase's ability to attach to the regulator (positive control). A particular DNA sequence is located upstream of the lac locus operator and promoter, where CAP and cAMP interact. The CAP-cAMP complex subsequently binds to this DNA sequence.

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Answer:

This is called the Greenhouse Effect.

Explanation:

The greenhouse effect is the mechanism by which some molecules in an atmosphere contribute to the planet's ability to retain heat. There are two concepts to grasp: two factors: 1) how heat energy escapes from warm objects; and 2) how some gases prevent the heat energy from escaping.

1. How heat energy escapes from warm objects

Anything that is warmer than absolute zero (-273.15 °C) emits electromagnetic radiation, or "glows." That is to say, any warm object radiates electromagnetic waves that carry some of the heat energy along with them as they travel away from the object.

Electromagnetic radiation: What is it? Waves are what move and convey energy through space. The amount of energy that a wave can carry increases with its frequency (waves per second). Low frequency electromagnetic radiation is referred to as "radio." Visible light is a much higher frequency type of electromagnetic radiation. X-rays operate at an even higher frequency.

The range of frequencies that warm objects produce depends on the object's temperature. We can see objects that are really hot glow because they emit a lot of visible light. Although cooler objects don't produce visible light, they nevertheless glow from low frequency electromagnetic radiation that is unseen. The average surface temperature of the Earth is 15 °C, and objects at this temperature emit "infra-red" electromagnetic waves, which have a lower frequency than red light and cannot be seen by human eyes. Since the sun's surface is about 6,000 degrees Celsius hotter than Earth's, it emits visible light. The fact that anything with a temperature above absolute zero glows is similar in many ways.

The Earth is 'glowing' with invisible infrared simply because it is warm. The infra red takes heat energy away from the Earth. It disappears into space.

2. How some gases stop the heat energy escaping

A molecule can vibrate. The tensions between the atoms that make up molecules resemble tiny springs and minuscule balls, respectively. The balls can be rhythmically brought closer together and farther apart by the springs as they compress and stretch. One approach to temporarily store energy is to cause a molecule to vibrate.

When electromagnetic waves strike a molecule, if they are of the proper frequency, the wave's energy can be converted into the vibrational energy of the molecule. In other words, the electromagnetic wave's energy is stored in the molecule. However, it doesn't retain the energy for very long before ceasing to vibrate and converting it back into an electromagnetic wave.

Which frequencies cause the molecule to vibrate depends on its characteristics. The frequencies at which carbon dioxide, methane, and other greenhouse gases vibrate are the same as those of infrared light. Because they don't vibrate at the same frequencies as nitrogen and oxygen molecules, infrared radiation passes right by them. On the other hand, there is a good chance that a carbon dioxide molecule will absorb an infrared wave's energy and momentarily store it as a vibration if it does so.

It's important to note that a vibrating molecule can eventually emit a wave that travels in any direction, including up, down, left, right, forward, and backward. Where the initial wave was going is irrelevant.

3. Putting it all together

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