Why are some genetic traits very common in certain parts of the world (ex:
brown eyes in California, blue
eyes
in Britain, etc.)?

Answer:

A- to provide a reference system

Explanation:

The equator and prim meridian used on maps provides a reference system for determining location and navigating the earth.

An equator is the only line of latitude that is a great circle.

Prime meridian is a line of longitude that is 0°

When both are used, they can form the basis of a reference system to determine places on earth.

Using these lines, we can assign values of coordinates to the earth surface to facilitate location determination.

The equator and prime meridian are used on maps to provide a reference system.

The equator and the prime meridian used on maps to provide a reference system. Thus, option A is correct.

The equator and prim meridian used on maps provides a reference system for determining location and navigating the earth. An equator is the only line of latitude that is a great circle. Prime meridian is a line of longitude that is 0°.

When both are used, they can form the basis of a reference system to determine places on earth. Using these lines, we can assign values of coordinates to the earth surface to facilitate location determination. The equator and prime meridian are used on maps to provide a reference system.

Therefore, When both are used, they can form the basis of a reference system to determine places on earth. The equator and the prime meridian used on maps to provide a reference system. Thus, option A is correct.

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Seizures can be caused by various abnormalities within the brain's structure, function, or chemistry. The Insular cortex is the most probable structure on the left side of the brain that triggered the tonic-clonic seizure in the 45-year-old man. Here option C is the correct answer.

A tonic-clonic seizure is a general type of seizure that involves the whole body. The human brain has several parts responsible for controlling different body functions. One such structure is the insular cortex, which is situated within the cerebral cortex.

The insular cortex is involved in detecting the physiological state of the body, which includes aspects such as pain, temperature, hunger, thirst, and even physiological stress or anxiety. Thus, the Insular cortex is the most probable structure on the left side of the brain that triggered the tonic-clonic seizure in the 45-year-old man.

The insular cortex is also known to be associated with the generation and propagation of seizures. Abnormal activity or lesions in the insular cortex can disrupt the normal electrical activity in the brain, leading to the onset of a tonic-clonic seizure. It plays a crucial role in the initiation and spread of epileptic activity, making it a likely culprit in this case. Therefore option C is the correct answer.

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Answer:

tape worms i think

Answer:

D. Roundworms I believe sorry if wrong ;)

When a codon undergoes deletion, it can have various consequences on the final protein product.

Codons are the building blocks of proteins, and any deletion can cause a frameshift mutation that alters the entire reading frame of the messenger RNA (mRNA) molecule.

This, in turn, can change the amino acid sequence of the protein and potentially affect its structure and function.

If the deletion results in a premature stop codon, the protein may be truncated and non-functional.

Alternatively, if the deletion occurs in a non-critical region, it may have no significant impact on the final protein product.

In some cases, the deletion may even result in a new protein variant with altered activity or function.

Overall, the effect of a codon deletion on the final protein product is highly dependent on the specific context and location of the deletion within the gene and the resulting mRNA molecule.

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Answer:

TGAATGCGGCTA

Explanation:

The complementary DNA codes for A is T and for G its C

Answer:

TGAATGCGGCTA

Explanation:

Remember these are the complementary dna base pairs

adenine with thymine

thymine with adenine

cytosine with guanine

guanine with cytosine

so a would change to t

c to g

t to a

etc

after pairing each letter we would end up with

TGAATGCGGCTA

Answer:

All carbohydrates are made from smaller building blocks known as monosaccharides. Their main function is energy storage. The elements found in carbohydrates include Carbon, Hydrogen, and Oxygen

Explanation:

Carbohydrates are a fundamental organic compound that is essential to life. Their building blocks are known as monosaccharides, these are also known as simple sugars such as glucose. They all follow the same multiple of the unit C6H2O (1 C : 2 H : 1 O). We need to carbohydrates to store energy so that when we consume them we can perform cellular respiration, a highly precise process where we can break down glucose to form ATP for our body.

Answer:

Although your picture isn't showing up for me, this Punnett Square I drew should give you somewhat of an idea for the answer.

Red is Dominant, Blue is Recessive.

The Purple boxes show a purple flower, while that last box with 2 Recessive genes shows a white flower.

Answer:

Phosphorus cycles between living things and the soil.

Plants absorb phosphates from the soil and turn them into organic compounds through assimilation.

Animals eat plants and pass the phosphorus through the food chain from one animal to the other.

An animal dies and decomposes, returning the phosphorus to the soil.

Explanation:

Answer:

Chromosomes

Explanation:

The animals in the novel "Animal Farm" concealed the fact that they were running out of food by falsifying their records. This was done in order to maintain the illusion that the farm was successful and to prevent the animals from losing faith in the revolution.

They did this by increasing the food production figures on the records and lying to the animals about how much food was actually available. This allowed them to keep up the appearance that everything was going well on the farm, even though it was not.

The pigs, who were in charge, did this to maintain their power and control over the other animals. They knew that if the animals found out that they were running out of food, they would lose faith in the revolution and potentially revolt against the pigs.

Your question is incomplete, most likely it was:

How did the animals in Animal Farm conceal the fact that they were running out of food? why did they do this?

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The attachment site at the origin is where the muscle attaches; the attachment site at the insertion is where the muscle attaches but moves during contraction.

Muscle and bone are joined together by tendons, which are fibrous connective tissues. Muscles can be joined to tissues like the eyeball through tendon connections as well.

The distinction between voluntary and involuntary muscles is that the former can move under conscious control or at the command of the mind, while the latter move automatically or without conscious command. Smooth muscles and cardiac muscles fall within the category of involuntary muscles.

Skeletal muscles with voluntary action are those that can be consciously controlled to contract and relax. Body movement is controlled by these muscles, which are attached to bones.

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Answer:

b slow the normal reuptake of excess serotonin from synapses in depression

Explanation:

Serotonin is a neurotransmitter that transports signals or messages between neurons.

Although other neurotransmitters are involved in depression affection, alteration in serotonin levels is an important cause of the disease.

Affected people that express depression show an alteration of the normal serotonin levels in the interneuronal space. There is a noticeable decrease in molecule concentration due to an increase in its reuptake.

The substances used in the depression treatment belong to the SSRI group. SSRI means Serotonin Selective Recapture Inhibitor. It means that these substances inhibit the reuptake of serotonin that usually occurs in affected patients.

ISSR treats depression by enhancing serotonin levels and its transmission by blocking the reuptake in neurons. In this way, there is more serotonin available to improve communication between neurons.

ISSRs are selective because their principal target is the serotonin molecule and not the other neurotransmitters.

Answer:

One unique situation in which an experiment could be used to test a hypothesis about evolution is studying the evolution of antibiotic resistance in bacteria.

Explanation:

Hypothesis: Exposure to antibiotics will lead to the evolution of antibiotic resistance in bacteria populations.

Experiment:

Start with a culture of bacteria that is susceptible to a specific antibiotic.

Divide the bacteria into two groups: a control group and an experimental group.

In the experimental group, expose the bacteria to gradually increasing concentrations of the antibiotic over multiple generations.

In the control group, maintain the bacteria in a controlled environment without exposure to the antibiotic.

Monitor and measure the growth and survival of both groups over several generations.

Regularly sample bacteria from both groups and test their susceptibility to the antibiotic.

Compare the results between the control and experimental groups to determine if the experimental group has developed antibiotic resistance over time.

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Answer:

The pigment that traps energy is chlorophyll

Answer:

During an earthquake, geologists use a machine called a SEISMOGRAPH to study seismic waves.

P waves can pass through both solid and molten rock, but S waves can pass only through SOLID rock.

Explanation:

Earthquakes help geologists understand Earth’s interior as during an earthquake, geologists use a machine called a seismograph to study seismic waves.

P waves can pass through both solid and molten rock, but S waves can pass only through solid rock.

Seismograph simply means an instrument that's used to record the motion of the ground when there's an earthquake.

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Many body tissues, including the liver, bile ducts, bone, and gut, contain the enzyme alkaline phosphatase (ALP).

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Answer:

50% chance

Explanation:

Humans have two sex chromosomes, the X chromosome and the Y chromosome. Males inherit both X and a Y chromosome, while females inherit two X chromosomes. Thus, the sex of the child is determined by the sex chromosome carried by the male gamete (i.e., X or Y chromosome) which fuses with the egg cell (always containing an X chromosome). In consequence, the chance of having a sperm containing an X chromosome (i.e., the chance of having a girl) is an independent event of previous fertilization events (which led to the formation of 4 different female zygotes), thereby the probability will be 50%.

Bioethics is the study of ethical, legal and the social issues that arise in the biomedical and the bio medicine research that will be arising in the life sciences.

In order to raise the valid questions and validations regarding the  research and the various experiments that are happening in the field of research that whether they are following ethical norms or not.

Doctors Without Borders analyses strict neutrality along with impartiality in name of the universal  and medical ethics and right to the humanitarian help and demands full and unhindered freedom in the exercise of its functions.

The correct answer is option C that encourages the doctors to treat patients without the any kind of restrictions and regulations along with the norms and the various authentic statements that can be accepted.

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Answer:

cubic meter (m3)

Explanation:

The oxygen cycle involves the movement of oxygen through the atmosphere, biosphere, and lithosphere, while the water cycle involves the movement of water through the atmosphere, hydrosphere, and lithosphere.

Both cycles involve the movement of matter through various components of the Earth's environment, are vital to the survival of living organisms, by the energy of the sun, involve the transformation of matter from one state to another, and influenced by human activities, such as deforestation and pollution.

The oxygen cycle is largely driven by photosynthesis, while the water cycle is driven by evaporation and precipitation. Oxygen is produced by plants during photosynthesis, while water is not produced by any living organism. The oxygen cycle does not involve a significant change in the chemical composition of the element, while the water cycle involves the transformation of water from one chemical form to another. The oxygen cycle is relatively fast, with oxygen molecules constantly cycling through the environment, while the water cycle is slower and can take years for water molecules to complete a full cycle.

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Damage to Seminiferous tubules is most likely to interfere with sperm formation.

Reproduction is the phenomenon of producing offspring. It has two main forms: sexual and asexual reproduction. In sexual reproduction, genetic information from each parent organisms  is fused and makes the individual genetically unique.

The male reproductive system is a series of sexual organs that play a role in human reproduction. These organs are located on the outside of the body and in the pelvis. The testicles are the main male reproductive organ and are responsible for the production of testosterone and sperm. Each testicle is 4–5 cm long, 2–3 cm wide, weighs 10–14 g, and is suspended in the scrotum by dart muscles and spermatic cords.

The seminiferous tubules are located within the testes and are the specific sites of meiosis and subsequent formation of male gametes, or spermatozoa.

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Answer:

it causes no pollution to the environment

Answer:

Krebs cycle involves a series of reactions which oxidize the pyruvic acid molecules formed from glycolysis to produce carbon dioxide, energy(atp) as well as water

Since Homo sapiens first appeared, its brain size appears to have increased significantly. Fossil evidence suggests that early Homo sapiens had an average brain size of around 1,200 cubic centimeters (cc), which is similar to the average brain size of modern humans.

However, over time, brain size increased, and by around 30,000 years ago, the average brain size had grown to around 1,400 cc.

There are several theories as to why the human brain has increased in size over time. One theory suggests that it may be related to our evolutionary history as hunter-gatherers. As our ancestors began to hunt and gather food, they needed to develop more complex cognitive abilities to track and locate prey, navigate their environment, and communicate with each other effectively. This may have led to an increase in brain size and complexity over time.

Another theory suggests that the development of complex social structures and communication systems may have played a role in the evolution of the human brain. As our ancestors began to live in larger groups and engage in more complex social interactions, they needed to develop more sophisticated communication skills and social cognition, which may have led to an increase in brain size.

Overall, the increase in brain size in Homo sapiens over time is likely the result of a combination of factors, including evolutionary pressures related to food acquisition, social structure, and communication. While brain size is not the only factor that determines cognitive ability, it is clear that our brains have evolved to be highly adaptable and capable of supporting a wide range of complex behaviors and cognitive processes.

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Answer :student 2

I had the same question in my test

Answer:

c

Explanation:

The remaining core of a supergiant after a supernova explosion, which is almost five times the size of Earth's sun, will likely collapse under its own gravity and undergo further transformation. The exact fate of the core depends on its mass, but it can either become a neutron star or a black hole.

When a supergiant star undergoes a supernova explosion, the outer layers of the star are ejected into space, leaving behind a dense core. If the core is less than about three times the mass of the sun, it will collapse further under its own gravity and become a neutron star. Neutron stars are incredibly dense objects, composed primarily of tightly packed neutrons. They have a strong gravitational field and often exhibit rapid rotation and emit beams of radiation.

However, if the core is more massive, typically greater than three times the mass of the sun, it will continue to collapse beyond the neutron star stage and become a black hole. Black holes are regions of space where gravity is so intense that nothing, not even light, can escape their gravitational pull. They are formed from the remnants of massive stars and have a singularity at their core, surrounded by an event horizon.

The fate of the remaining core depends on its mass, with more massive cores leading to the formation of black holes. The collapse and transformation of the core is driven by the intense gravitational forces present after the supernova explosion.

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Answer:

The light rays that are hitting the earth at 90 degrees are known as direct rays. ... Areas of the Earth that are hit by direct rays are warmer than areas that are hit by indirect rays. The equator (yellow) is always hit by direct rays of the sun. This is why it is always warm there.

Explanation:

hope it becomes helpful to you ☺️☺️

good luck

Naturally, water changes between states throughout the water cycle as it evaporates from the surface, forms clouds and then precipitates back to the Earth as rain, snow or hail.

Water is a unique substance that can exist in three states; solid, liquid and gas. The water cycle is a continuous process of changing between these states through natural processes such as evaporation, condensation and precipitation. Water evaporates from the surface, rises into the atmosphere and forms clouds.

These clouds may release the water back to the Earth as precipitation, which can flow into rivers, lakes or oceans. Some of the precipitation may also infiltrate the ground and become groundwater. The water cycle helps maintain the Earth's water balance, provides a vital resource for life on the planet and plays a crucial role in shaping the environment.

The answer is generally as no image is given.

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