nature's defualt eating is to make every mammal's external anatomy

Answer:

Iron is a lustrous, ductile, malleable, silver-gray metal (group VIII of the periodic table). It is known to exist in four distinct crystalline forms. Iron rusts in damp air, but not in dry air. It dissolves readily in dilute acids.

Explanation:

Answer:

it can rust

Explanation:

Here is a dichotomous key based on the information provided:

- Can it produce its own food?

Yes: Go to 2

No: Go to 3

- Is the organism unicellular?

Yes: It is a yeast

No: It is a hydra

- Does the organism have hair?

Yes: It is a cat

No: Go to 4

- Is the organism unicellular?

Yes: It is a bacteria

No: The organism cannot be identified using this key.

Here is a new set of questions and a corresponding dichotomous key:

- Does the organism have wings?

Yes: Go to 2

No: Go to 3

- Is the organism a bird?

Yes: It is a bird

No: It is an insect

- Does the organism live in water?

Yes: Go to 4

No: Go to 5

- Is the organism a fish?

Yes: It is a fish

No: It is an amphibian

- Does the organism have four legs?

Yes: Go to 6

No: Go to 7

- Is the organism a mammal?

Yes: It is a mammal

No: It is a reptile

- Is the organism microscopic?

Yes: It is a microbe

No: The organism cannot be identified using this key.

A dichotomous key is a tool used by biologists and other scientists to identify different species of organisms based on their observable characteristics.

The key presents a series of questions or statements about the characteristics of the organism, which are answered with either a "yes" or "no" response, leading to a final identification of the organism. It is an important tool in fields such as biology, ecology, and taxonomy.

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Answer:

New crust forms at plates margin as magma rises creating ridges under oceans such as the Mid-Atlantic Ridge and the East Pacific Rise.

Answer: B. It will gradually increase in size for approximately two weeks and it will gradually decrease in size for approximately two weeks.

Explanation:

The moon orbits around the earth in 27.322 days. It is the brightest celestial body. It does not shine under own power instead glows with the reflected sunlight. Moon start dark and gets illuminated by the sunlight over the time of two weeks. When moon's disk becomes fully bright it gets fade, again returns to dark in about two weeks.

Answer:

Explanation:

DONT KNOW SORRY

DNA leads to RNA molecule, which can lead to the creation of proteins in the cell through the process of translation. Thus, the correct option is C.

Proteins are the organic molecules which are present in living organisms. Proteins serve a wide range of functions including the organization, transportation, and defense mechanism. Proteins are composed of long amino acid chains, polypeptides, and structure levels are up to level four.

Major functions of proteins in the body include oxygen transport through hemoglobin, proteins as enzymes, lysozyme as a defensive enzyme, antibodies are proteins, structural proteins, contractile proteins, and as signal proteins.

Therefore, the correct option is C.

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The three ways by which the atmosphere, lithosphere, and hydrosphere can be damaged are pollutant emissions, particulate matter, and combustion appliances.

Solid, liquid, and certain gases that are suspended in the air are the main contributors to air pollution. These gases and particles can come from factories, dust, pollen, mold spores, volcanoes, wildfires, and vehicle and truck emissions. Aerosols are solid and liquid particles that are suspended in our air.

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One of the events that could give credence to the panspermia hypothesis would be the presence of carbon-based molecules on meteors that strike the earth's surface.

All biomolecules of life are carbon-based.  Examples of these molecules include carbohydrates, proteins, ribonucleic acids, etc.

In order for life to exist in a place, carbon must be abundant.

Thus, the presence of carbon-based molecules on meteors from another planet that hit the surface of the earth may be evidence that life exists on another planet.

This can be used as evidence that life on earth came from extraterrestrial sources.

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The common bands in EcoRI digest lane as well as double digest lane will indicate restriction fragments having a BamHI restriction site. Option D is correct.

The EcoRI digest lane contains DNA samples that have been treated with the EcoRI restriction enzyme, which recognizes a specific DNA sequence and cuts the DNA at that site. The common bands observed in this lane represent fragments that have been cleaved by EcoRI at the same recognition site(s) in the DNA sample.

The double digest lane contains DNA samples that have been treated with two different restriction enzymes, including EcoRI and BamHI. When both enzymes cut the DNA at different recognition sites, it results in the formation of specific fragments. The common bands observed in the double digest lane indicate fragments that have been cleaved by both EcoRI and BamHI, indicating the presence of a BamHI restriction site in those fragments.

Hence, D. is the correct option.

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--The given question is incomplete, the complete question is

"What do the common bands in the ecori digest lane and double digest lane indicate? A) restriction fragments without a BamHl restriction site B)  incomplete digestion by the BamHI restriction enzyme C) a 2 and 3 kb length standard run in these lanes D) restriction fragments with a BamHI restriction site."--

DNA strand replication begins on one end of the open part of the DNA strand which is therefore denoted as option D.

This is referred to as deoxyribonucleic acid and it is the genetic material of most living organisms as it ernsures thast traits are poassed from the parent to the offspring.

DNA replication initiates at specific points, called origins, where the DNA double helix is unwound which means it is at  one end of the open part. A short segment of RNA, called a primer, is then synthesized and acts as a starting point for new DNA synthesis.

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Answer:

The one on the right.

Explanation:

Human traits and characteristics that are genetically influenced have an evolutionary history that is retained in our DNA. Therefore option A is correct.

Through the process of natural selection, genetic variations that provided advantages for survival and reproduction were passed down over generations.

These genetic adaptations accumulated over time, shaping the traits that make us uniquely human. This evolutionary history is stored in our DNA, which contains the instructions for building and regulating our bodies.

While environmental factors can also influence traits, the genetic foundation built over millions of years forms the core basis for the traits we inherit.

Therefore option A is correct.

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Your question is incomplete, but most probably your full question was.

Human traits and characteristics that are genetically influenced have an evolutionary history that is:

A. Retained in our DNA

B. Governed solely by environmental factors

C. Developed in a single generation

D. Unrelated to biological processes

The conclusion which an be drawn based on the discovery of thick-shelled clam fossils in an area is that the area was once at the bottom of a deep ocean and is denoted as option A.

This is a term which is referred to as the remains of plants and animals which have been preserved in the earth crust. Fossil are used for various reasons such as determining the age and evolutionary history of organisms .

On the other hand, a clam is a mollusc which has no gut or functional digestive system and it uses energy in hydrogen sulfide to replace sunlight via bacteria. Giant clams are mostly found in the deep parts or areas of oceans.

This therefore means that the area where the fossil was found has ties with the deep parts of the ocean and is therefore the reason why option A was chosen.

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Answer: the condition or process of degrading or being degraded.

Explanation: Give me 5 stars

Answer: I’m not sure but it relates to natural selection because the rodents depend on the tree for survival and the tree is neither harmed or benefited from the rodents the cause and affect is the rodents stay in the tree and the tree is neither harmed or benifited. Pls do not rely on my answer I’m just saying what I think

Explanation:

The abiotic factors will define which organisms are able or not to live in a specified place. The living organisms will constitute the biotic factors, which define if and how can an organism live in a specified environment. So, the abiotic factors are controlling the biotic factors of an environment. Factors like snow, and rain can determine if the animal belongs there.

Answer:

Translate to English

Explanation:

Cytotoxic T cells kill their targets by programming them to undergo apoptosis. When cytotoxic T cells are mixed with target cells and rapidly brought into contact by centrifugation, they can program antigen-specific target cells to die within 5 minutes, although death may take hours to become fully evident.

In cellular immunity, a killer T cell identifies and kills a virus-infected cell because of the viral antigen on its surface, thus aborting the infection because a virus will not grow within a dead cell.

Thus, Cytotoxic T cells kill their targets by programming them to undergo apoptosis.

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Answer: b: gamma rays

Explanation:

In this exercise, we need to know the types of radiation and their ionizations, so we have that the other type of radiation used in the medical field is:

The gamma rays.

Radiations are electromagnetic waves or particles that propagate with a certain speed. They contain energy, electrical and magnetic charge. They can be generated by natural sources or by man-made devices. They have variable energy from small to very high values.

Among the main examples of ionizing radiation, we have:

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Answer:

Desert Niches

Adaptations include a species' selection of food, water and shelter as well as other facts of its behavior. Niches within desert ecosystems include open desert scrub, open grasslands, washes and sandy soils.

Explanation:

The operon that displays both positive and negative gene regulation is the Lac operon. This operon is regulated by the presence or absence of lactose and glucose in the environment.

When lactose is present, it binds to the repressor protein and causes it to detach from the operator site, allowing for transcription of the genes. This is an example of positive regulation. On the other hand, when glucose is present, it inhibits the production of cyclic AMP (cAMP), which is required for the binding of the activator protein to the promoter region.

This is an example of negative regulation. Therefore, the correct answer is b) Lac operon.

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Answer:

Explanation:

To calculate how much more blood flows per minute to the skeletal muscles during intense exercise than during rest, we need to use the following formula:

exercising - resting = increased blood flow

Substituting the given values, we get:

exercising - resting = increased blood flow

exercising - 1,200 cm³/minute = 4.CC

To solve for exercising, we need to isolate the variable on one side of the equation. Adding 1,200 cm³/minute to both sides, we get:

exercising - 1,200 cm³/minute + 1,200 cm³/minute = 4.CC + 1,200 cm³/minute

exercising = 4.CC + 1,200 cm³/minute

Therefore, the equation to calculate how much more blood flows per minute to the skeletal muscles during intense exercise than during rest is:

exercising = 4.CC + 1,200 cm³/minute

True, The nasopharynx is the uppermost part of the pharynx and is responsible for receiving air from the nose. From the nasopharynx, air flows into the trachea,

which is a tube-like structure that extends from the larynx to the bronchi in the lungs. The trachea is located dorsal, or posterior, to the esophagus, which is the muscular tube that carries food and liquids from the mouth to the stomach.

The trachea and esophagus are located in close proximity to each other in the neck and chest, and they share some of the same muscles and cartilage.

However, they are separate structures and have different functions. The trachea is responsible for delivering air to the lungs, while the esophagus is responsible for delivering food and liquids to the stomach. The proper function of both the trachea and esophagus is essential for maintaining proper respiratory and digestive health.

The trachea is the tube responsible for carrying air to and from the lungs, while the esophagus is the tube that transports food and liquids from the mouth to the stomach. These two structures run parallel to each other, with the trachea positioned in front of the esophagus.

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Answer:

Definition of a Wave

Explanation:

a disturbance or variation that transfers energy progressively from point to point in a medium and that may take the form of an elastic deformation or of a variation of pressure, electric or magnetic intensity, electric potential, or temperature.

Axon . The axon is the long neuronal process that carries nerve impulses away from the soma (cell body) of the nerve cell.

The long neuronal process that generally conducts impulses away from the soma of the nerve cell is called the axon. The axon is a specialized extension of a nerve cell (neuron) that transmits electrical signals, known as action potentials, away from the cell body towards other neurons, muscles, or glands.

The axon arises from a region of the cell body called the axon hillock and is covered by a lipid-rich insulating layer called the myelin sheath. The myelin sheath is formed by specialized cells called oligodendrocytes in the central nervous system and Schwann cells in the peripheral nervous system.

The axon may have branches called axon collaterals that allow for communication with multiple target cells. At the end of the axon, there are small structures called axon terminals or synaptic knobs that form connections, called synapses, with other neurons or target cells.

The length of axons can vary greatly, ranging from microscopic lengths to several feet in larger animals. The diameter of an axon can also influence the speed of impulse transmission, with larger axons typically conducting signals faster.

The axon is the long neuronal process that carries nerve impulses away from the soma (cell body) of the nerve cell. It serves as the primary conducting pathway for transmitting electrical signals to other neurons or target cells. The axon's structure, including the presence of the myelin sheath and axon terminals, allows for efficient and rapid communication within the nervous system.

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Answer:

the 2nd answer

Explanation:

Answer: I believe the order of answers should be 2, 3, 4.

Explanation:

Part A seems like it is describing a strange character. Part B is appearing to depict a mysterious event. Part C describes a positive interaction.

(If this is wrong, I am terribly sorry, but I do hope this helps!)

The correct аspect of аn Аmericаn myth:

1. Rip now felt а vаgue аpprehension steаling over him; he looked аnxiously in the sаme direction, аnd perceived а strаnge figure slowly toiling up the rocks, аnd bending under the weight of something he cаrried on his bаck. ⇒ Remarkable, strange, or exaggerated characters (2) and positive message about a nation and its people (4)

2. Her deck once red with heroes’ blood. Where knelt the vаnquished foe. When winds were hurrying o’er the flood. Аnd wаves were white below. ⇒ Set in the past, often remote areas and exiting times (1)

3. Thanks, thаnks to thee, my worthy friend, for the lesson thou hаst tаught! Thus аt the flаming forge of life, our fortunes must be wrought: thus on its sounding ⇒ Incredible, heroic, impressive, magical or mysterious events (3)

The story "Rip Vаn Winkle" is а greаt exаmple of Аmericаn Mythology becаuse of the remаrkаble chаrаcters, the incredible аnd unbelievаble events thаt occur, аnd the fаct thаt it gives hope аnd presents positive messаges аbout Аmericа through the long journey Rip tаkes in the story.

The poem titled 'Old Ironsides' penned by Oliver Wendell Holmes explores the theme of 'pride in bаttle аnd deаth.' The speаker feels proud of receiving аn honorаble deаth. The poem is centered аround а ship thаt served in numerous bаttles but still doomed to be discаrded.

The quote from "Longfellow’s Blacksmith" tells about the Blаcksmith understаnds thаt he cаn forge his own future, by аny method he deems fit. А life worth living will require thousаnds of hаmmer swings, but he is in full control of how thаt hаmmer is swung.

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a. The Great Smoky Mountains National Park: Nonexcludable and rivalrous. Free rider problem likely.

b. Luetta Moore Park playground: Nonexcludable. No free rider problem.

c. National defense: Nonexcludable and nonrivalrous. Free rider problem exists.

d. Subway train: Nonexcludable. Free rider problem possible during peak hours.

a. The Great Smoky Mountains National Park: It is nonexcludable because it is difficult to prevent individuals from accessing the park. However, it is rivalrous as the park's resources, such as campsites or parking spaces, can be depleted. Both nonexcludability and rivalry suggest that the park is both nonexcludable and rivalrous. The free rider problem may occur since people can enjoy the benefits of the park without paying for its maintenance or preservation.

b. Playground at Luetta Moore Park: The playground is nonexcludable since it is difficult to prevent people from using it. However, it is nonrival as one person's use does not diminish the usability of the playground for others. Therefore, it is only nonexcludable. The free rider problem may not apply here since the use of the playground does not impose costs on others.

c. National defense: National defense is both nonexcludable and nonrival. It is nonexcludable because it is challenging to exclude individuals from benefiting from defense. It is nonrival because the defense provided to one person does not diminish the defense available to others. Both characteristics make national defense both nonexcludable and nonrival. The free rider problem is prevalent in national defense since individuals can benefit from defense without incurring the costs associated with it.

d. Subway train: A subway train is nonexcludable since it is difficult to prevent individuals from using it. However, it can be rivalrous during peak hours when overcrowding may limit the available space. Therefore, a subway train is only nonexcludable. The free rider problem may not be significant here as long as there are no capacity constraints or overcrowding issues.

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Answer:

They are all steps taken to perform the scientific method.

Explanation:

Hypothesis is an educated guess made from observations, a theory is a hypothesis test with a significant amount of data, and scientific law is a theory that is consistent with generations of data.  They are all different.  However, they are all apart of a process called the scientific method.