before circulating through the blood/lymph, t cells must first develop in the [ select ] . t cells that are still developing are called

Answer:

water air soil sunlight and minerals

Explanation:

The biodiversity and distribution of organisms within an ecosystem is due to both abiotic (non-living) and biotic (living) factors.

Answer:

it is B

Explanation:

A scanning electron microscope would be the best choice to look at the wings of two different butterflies and determine which one is a Monarch Butterfly and which one is a Viceroy Butterfly.

An electron microscope called a scanning electron microscope (SEM) scans a sample's surface with a concentrated stream of electrons to create pictures of the material. As the electrons contact with the sample's atoms, different signals emerge that provide details about the sample's surface topography and composition.

A raster scan pattern is used to scan the electron beam, and a picture is created by combining the detected signal's strength with the beam's position. Using a secondary electron detector, the most popular SEM mode detects secondary electrons released by atoms stimulated by the electron beam (Everhart–Thornley detector).

The specimen topography affects, among other things, the quantity of secondary electrons that may be detected and, consequently, the signal intensity.

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Answer:

A (-7)/(1)

Explanation:

(-7)/(-1) would be a positive 7.

7/1 would be a positive 7.

(-7)/(0) would be 0.

Answer:

limestone and salt

Explanation:

we can break limestone into smaller pieces.Each tiny particles are made of molecule . But we regard forth one before broken as compound

Water, carbon dioxide and table salt are the examples of compounds. The each compound has a certain set of characteristics.

Compounds are defined as a substance created by fusing two or more chemical components together.

It can also be defined as something made up of similar molecules with atoms from two or more different chemical components.

A chemical compound is defined as a substance made of numerous similar molecules joined by chemical bonds and comprising atoms from various chemical elements.

Pure substances known as compounds are made up of atoms from two or more distinct elements.

There are three types of compounds.

Thus, Water, carbon dioxide and table salt are the examples of compounds. The each compound has a certain set of characteristics.

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Answer:

because it is near the equater so it is in a warmer climate

Explanation:

The relationship between acidity, alkalinity, and potassium in the body is vital for maintaining proper pH levels, which is essential for optimal physiological functioning.

The relationship between states of acidity and alkalinity and potassium in the body is essential for maintaining proper physiological functions. Acidity and alkalinity are measured on the pH scale, where a lower pH indicates acidic conditions and a higher pH indicates alkaline conditions. The body's optimal pH range is slightly alkaline, around 7.35 to 7.45. Potassium is an important electrolyte that plays a crucial role in regulating the body's acid-base balance. It does this by working in concert with other electrolytes, such as sodium and bicarbonate, to maintain the appropriate pH levels in blood and tissues. An imbalance in potassium levels can lead to either acidosis (excess acidity) or alkalosis (excess alkalinity), both of which can have adverse effects on the body's overall health.
In summary, the relationship between acidity, alkalinity, and potassium in the body is vital for maintaining proper pH levels, which is essential for optimal physiological functioning.

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Answer: Which statement best describes acceleration? Acceleration is the rate of change of velocity of an object.

Explanation:

The value of q in the given population of frogs is 0.5.

In the context of Hardy-Weinberg equilibrium, the frequency of an allele (q) can be determined by taking the square root of the proportion of individuals exhibiting the corresponding phenotype. In this case, there are 75 frogs with long legs out of a total of 100 frogs. Thus, the proportion of frogs with the long leg phenotype is 75/100 or 0.75.

To find q, we take the square root of 0.75, which gives us 0.866. However, q represents the frequency of the recessive allele, and in this case, the long legs are likely determined by a dominant allele. Therefore, to calculate q, we subtract the frequency of the dominant allele (p) from 1. Since p + q = 1, and we know p = 1 - q, we can substitute p in the equation to find q. Solving the equation gives us q = 1 - p = 1 - 0.5 = 0.5.

Hence, the value of q in this population of frogs is 0.5, indicating that the frequency of the recessive allele for short legs is 0.5 or 50%.

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Answer:

2 number answer goes like

During the beginning stage of the germination, the seeds take up water rapidly and this results in swelling and softening of the seed coat at an optimum temperature. This stage is referred to as an Imbibition. It starts the growth process by activation of enzymes. The seed activates its internal physiology and starts to respire and produce proteins and metabolizes the stored food. This is a lag phase of the seed germination.

By rupturing of the seed coat, radicle emerges to form a primary root. The seed starts absorbing underground water. After the emerging of the radicle and the plumule, shoot starts growing upwards.

Answer:

1) suitable temperature, air and oxygen

2) water soften the testa to enable both the plumule and radicle to emerge and it also allows diffusion of gases

3) Based on my opinion .... There is no water absent (dry cotton wool that used for germination), water is required for germination and the seed was kept in a refrigerator, thus low temperature is not suitable for germination.

Hope this helps

Answer:

the answer is A

Explanation:

Because there is no passage which I guessed

Answer:

1 is the correct answer :)

Answer:

Answer is uhhhhhhhhh

Explanation:

A??

The scientist collaborates with others to plan and carry out an experiment and then writes a paper that has a clear conclusion. He submits it to a professional journal for peer review, after which the results are presented publicly.

Answer:

ig A

Explanation:

Answer:

True

Explanation:

It is true that Mendel always got close to a 9:3:3:1 ratio for phenotypes in the F2 generation of any dihybrid cross. This validates his law of independent assortment of genes.

The 9:3:3:1 is usually gotten from any dihybrid cross of F2 generation. The results given are always 9 offsprings containing dominant traits, 3 offsprings each which possess a dominant and recessive trait and 1 offspring with a recessive trait.

The given statement "Muscles will contract using the contractile proteins to produce a movement" will be true. Because, of the inherent mechanism of muscle tissue and the interaction between actin and myosin proteins.

Sliding Filament Theory: Sliding Filament Theory states that during muscle contraction, the actin filaments slide past the myosin filaments, resulting in the shortening of the sarcomeres (basic contractile units of muscle fibers). This sliding of filaments is made possible by the interaction between actin and myosin proteins.

Actin and Myosin Interaction: Actin and myosin are two key contractile proteins involved in muscle contraction. Actin forms thin filaments, while myosin forms thick filaments. When a muscle is stimulated, myosin heads attach to binding sites on the actin filaments, forming cross-bridges. The myosin heads then undergo a conformational change, pulling the actin filaments towards the center of the sarcomere.

ATP as an Energy Source: Muscle contraction requires energy. ATP (adenosine triphosphate) is the primary energy source for muscle contraction. ATP is necessary for the detachment of myosin heads from actin, enabling the myosin heads to bind to actin again and continue the sliding process. The breakdown of ATP into ADP (adenosine diphosphate) and inorganic phosphate provides the energy required for these steps.

Coordination for Controlled Movement: The coordinated contraction of multiple muscle fibers within a muscle allows for controlled movement. By adjusting the recruitment of motor units (a motor neuron and the muscle fibers it innervates), the body can regulate the force and speed of muscle contractions, enabling precise movements.

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Answer: Age related info

Explanation: It gives idea about the age of fossils and through this one can compare two fossils existense at same time and give their relation

Answer:

Recombinant DNA is technology scientists developed that made it possible to insert a human gene into the genetic material of a common bacterium. This “recombinant” micro-organism could now produce the protein encoded by the human gene. Scientists build the human insulin gene in the laboratory. Then they remove a loop of bacterial DNA known as a plasmid and insert the human insulin gene into the plasmid. Researchers return the plasmid to the bacteria and put the “recombinant” bacteria in large fermentation tanks. There, the recombinant bacteria use the gene to begin producing human insulin. Scientists harvest the insulin from the bacteria and purify the substance for use as a medicine for people.

Explanation:

Since the given organisms prepare their own food, hence none of the organisms mentioned are heterotrophs. Thus, the correct answer is Option D.

Heterotrophs are organisms that depend on other species (plants and animals) for food since they are unable to prepare it for themselves. They are dependent on these producers for food, either directly or indirectly.  

The rose and the pine tree, two of the choices given, are both autotrophs since plants can make their own food through photosynthesis. On the other hand, the deep-sea tubeworm is a chemoautotroph, meaning it gets its energy from inorganic substances in its surroundings.

Therefore, the correct answer is Option D.

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Answer:

D.a process that recycles elements and other matter through the biosphere

Explanation:

The White Hat in the Six Thinking Hats method represents a focus on facts, data, and information.

The Six Thinking Hats method, developed by Edward de Bono, is a technique for facilitating productive thinking and decision-making. Each "hat" represents a different perspective or thinking style. The White Hat symbolizes an analytical and objective approach, where participants focus on gathering facts, data, and information relevant to the problem or decision at hand. It encourages logical thinking, examining available evidence, and considering what is known or can be learned about the topic. The White Hat helps to ensure a well-informed and evidence-based exploration of ideas and solutions.

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Answer:

energy is in everything. think of a piece of wood when burnt.how does it stay burning? it just needs something to release the energy as in heat (like vinegar and steel wool)

Explanation:

i wouldnt take my word for it for a test answer but if it's a general question then this is how it's explained

The root of the spinal cord that is receiving this information is A. Dorsal as this root of the spinal cord contains sensory nerves.

When you touch a hot stove, the sensory information regarding heat is detected by specialized nerve endings called thermoreceptors in your skin. These thermoreceptors send signals through sensory neurons to the spinal cord for further processing and transmission to the brain.

In the spinal cord, the sensory neurons carrying the heat information enter through the dorsal root. The dorsal root is located on the backside of the spinal cord and contains sensory nerve fibers, also known as afferent fibers.

These fibers transmit sensory information from the periphery, such as touch, temperature, and pain, to the central nervous system.

Once the sensory information reaches the dorsal root, it is relayed to specific regions in the spinal cord and then transmitted to higher brain centers for further interpretation and response.

This process allows your nervous system to quickly detect and respond to potentially harmful stimuli, such as the heat from a hot stove, to initiate appropriate protective actions like pulling your hand away to avoid injury.

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Answer:

Answer:

C.

Oxygen molecules are very small, while DNA molecules are very large.

Sorry you've waited so long for an answer! I belive the type of learning associated with a crow vending machine is trial and error! So sorry once again!

slow heart rhythm (bradycardia)

Explanation:

when a persons heart beat is not normal is typically let's say 60-100 beats per minute that means the blood is not pumped properly throughout the body. so the pacemaker works as an heart machine to keep your heart beating.

Since many nutrient cycles are interconnected, modifications to one cycle will have an impact on another. This implies that the quantity of nitrogen present in an ecosystem has a direct impact on changes in the amount of carbon dioxide fixed.

The movement of substance and energy between living things and the ecosystem's non-living components happens through a mechanism called the nutrient cycle. This happens because once plants and animals ingest nutrients from the soil, they die and decompose, releasing those nutrients back into the ecosystem.

Various Nutrient Cycles

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The digestive system is involved in the breakdown of molecules to yield energy. As food passes along the digestive gut, it undergoes various processes in its breakdown.

Indigestible residues along with some of the non-reabsorbed secretions of digestive organs, undergo Compaction where the fluids are removed and a remaining solid is created.

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