Ethynyl estradiol, a synthetic hormone, is a common component of birth control pills. Which bond in ethyny estradiol is an alkyne? ethynyl estradiol OAA B.B occ ODD OE. A and

A final statement or concluding statement

In the dna isolation process, Meat Tenderizer is used to break down the protein complexes and allow the dna molecules to easily precipitate.

Deoxyribonucleic acid (DNA ) isolation is an extraction process of DNA from various sources. Methods used to isolate DNA are dependent on the source, age, and size of the sample. Despite the wide variety of methods used, there are some similarities among them. In general, they aim to separate DNA present in the nucleus of the cell from other cellular components.

Three steps are involved in DNA isolation:

1. Lysis: This is the mechanical breakdown of the cell during which the DNA is released from the nucleus. Enzymes and detergents like Proteinase K must be used throughout this process.

2- Precipitation: During this step, salt and alcohol are used to precipitate the DNA.

3. Purification: This step rids DNA of contaminants. DNA is extracted by being cleaned with ethanol and water.

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The concept of negative and positive feedback is based on the amount of secretions of hormones which changes the final output of the body parameters.

Feedback mechanism is an ideal way of controlling hormone levels as they involve constant monitoring and regulations to keep hormone levels stable (in control). It is essential because Hormones can affect target organs at low concentrations so even a small quantity can have drastic effects on the body. Also, the length of time during which hormones remain active is variable which affects the secretion. Positive feedback means amplified secretion so that body drifts away from equilibrium condition. Negative equilibrium means suppressed secretion so that body drifts towards the equilibrium condition. These feedbacks helps in maintaining endocrine system in stabilized form.

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AAA (codes for the amino acid lysine, Lys) being mutated to AAG (which also codes for Lys) are some silent point of mutations.

One of the three forms of substitution mutations (also known as point mutations), along with nonsense and missense, is a silent mutation. A silent mutation specifically happens when a change in a gene's DNA sequence has no impact on the subsequent amino acid sequence of the protein it codes for. Since both of those codons translate to the same amino acid, Ser, or serine, there is no actual change in the protein produced by this gene if the DNA sequence changes from AGC to AGA, for instance. However, the matching RNA would change from UCG to UCU. Because it has no immediate impact, the mutation is said to be "silent." The quiet mutation is one of the various point mutation kinds, which are all displayed below.

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Answer:

option A is correct

Explanation:

Answer:

A. Plates that move toward each other

Explanation:

This the correct answer.

All - growth, exchange of gases, excretion, reproduction, and death (option d).

All living organisms undergo various life processes to maintain their existence. Let's analyze each option to determine which life processes are carried out by an organism's cells:

A. Only growth and exchange of gases: While cells are involved in growth and exchange of gases, they also participate in other life processes. This option is incomplete.

B. Only growth, exchange of gases, and reproduction: Cells play a crucial role in reproduction as they are responsible for the production of gametes and the process of cell division. However, there are additional life processes that cells also undertake.

C. Only growth, exchange of gases, excretion, and reproduction: This option includes excretion in addition to growth, exchange of gases, and reproduction. Cells participate in excretion by eliminating waste materials. However, there is one more life process that cells experience.

D. All - growth, exchange of gases, excretion, reproduction, and death: This option encompasses all the mentioned life processes. Cells are involved in growth as they undergo cell division and increase in number. They exchange gases through processes like respiration. Cells excrete waste products. They participate in reproduction through the formation of gametes and cell division. Lastly, cells also experience death as they have a limited lifespan.

Therefore, the correct answer is D. All - growth, exchange of gases, excretion, reproduction, and death.

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Protons (H+) pass through ATP synthase in order to turn ADP + Pi into ATP during the process of oxidative phosphorylation in cellular respiration.

ATP synthase is an enzyme complex found in the inner mitochondrial membrane (or the thylakoid membrane in chloroplasts) that plays a key role in ATP synthesis. It utilizes the energy stored in the proton gradient to convert ADP (adenosine diphosphate) and inorganic phosphate (Pi) into ATP (adenosine triphosphate).

During oxidative phosphorylation, protons are pumped across the inner mitochondrial membrane from the matrix to the intermembrane space, creating a proton gradient. This proton gradient is established by the electron transport chain, which transfers electrons from electron donors to electron acceptors, ultimately leading to the pumping of protons.

The protons then flow back into the matrix through ATP synthase, which acts as a molecular turbine. As the protons pass through ATP synthase, their flow drives the rotation of a rotor-like structure, causing conformational changes in the enzyme that allow the synthesis of ATP from ADP and Pi.

In summary, the passage of protons through ATP synthase is necessary to power the conversion of ADP + Pi into ATP, a process known as chemiosmotic phosphorylation or oxidative phosphorylation.

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Answer:

A, B, and D

Explanation:

Stem cells are special human cells that are able to develop into many different cell types. They commonly come from bone marrow, and from embryos.

Answer:

Native plant and animal populating.

Please sir said thank you and give braniliest!??

Answer:

native plants and Animals

Answer:

B that most multicellular animals don't reproduce asexually

Given what we know, we can confirm that while proteins are responsible for the of living organisms, it is the DNA that provides the blueprint for the organization, development, and function of living things.

Therefore, we can confirm that DNA that provides the blueprint for the organization, development, and function of living things due to its function of encoding every aspect of an organism's development and controlling the expression of each aspect.

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The magma rises from Earth’s crust, pushing the North American plate and the Eurasian plate away from each other at the Mid-Atlantic Ridge, due to the movement of the plates, the Atlantic Ocean continuously becomes wider.

Plate tectonics is the predominantly accepted scientific theory that states that the Earth's lithosphere is composed of several large tectonic plates which have been slowly moving since about 3.4 billion years ago.

When these plates move apart, magma rises to the surface a dozen kilometers below the ocean floor which form a new ocean floor. Large-scale volcanic events create large structures that over time form very ridges, plateaus like Azores, islands and seamounts.

Mountains arise where plates try and force together, or converge, as well as continents shift and oceans form where plates move apart, or diverge.

Thus, the magma rises from Earth’s crust, pushing the North American plate and the Eurasian plate away from each other at the Mid-Atlantic Ridge, due to the movement of the plates, the Atlantic Ocean continuously becomes wider.

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Answer: C

Explanation:

A is ncorrect becuase viruses do not contain only carbs.

Answer:

true

Explanation:

False, there is a difference between primate language and human language.

While both primates and humans possess the ability to communicate through various forms of language, there are distinct differences between primate language and human language. Primates, such as chimpanzees and gorillas, use a form of communication known as "primate language," which primarily consists of vocalizations, gestures, and body language. However, primate language is more limited in its complexity and lacks the grammar, syntax, and abstract thinking present in human language.

Human language, on the other hand, is characterized by its rich vocabulary, grammatical structures, and the ability to convey abstract concepts and ideas. Humans can communicate through spoken and written language, allowing for complex communication that is not observed in primate language. Thus, while both primates and humans possess language capabilities, human language is more advanced and distinct in its complexity.

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An important feature added to the plasma cells during the transition process is the ability to secrete large amounts of antibodies.

During a humoral or antibody-mediated immune response, B cells that have been activated by helper T cells undergo a process of differentiation into plasma cells. Plasma cells are specialized cells that are capable of producing large quantities of antibodies, which are proteins that can bind specifically to foreign antigens and help to neutralize or eliminate them from the body.

To better perform their function, plasma cells undergo changes that enable them to produce and secrete antibodies at a much higher rate than B cells. Specifically, they undergo a massive expansion of their endoplasmic reticulum and Golgi apparatus, which are the organelles responsible for protein synthesis and secretion.

This allows them to synthesize and package large quantities of antibodies for release into the bloodstream. In addition, plasma cells have a shorter lifespan than B cells, allowing them to rapidly produce and secrete antibodies in response to an infection.

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Answer:

C, D

Explanation:

Catecholamine levels can be measured in the blood or urine to evaluate certain conditions related to the adrenal glands, such as pheochromocytoma, neuroblastoma, or sympathetic dysfunction. Certain foods can affect the results of a test measuring catecholamine levels.

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The term for when a similar trait evolves in two unrelated species is called convergent evolution. This occurs when different species face similar environmental pressures and independently develop similar adaptations in response.

In contrast, coevolution is when a species evolves in response to another species. This can occur when two species have a close ecological relationship, such as predator-prey or mutualistic interactions.

Coevolution often involves reciprocal adaptations between the two species, with each driving changes in the other over time.

Overall, these concepts help us understand how different species adapt and evolve in response to their changing environments and interactions with other organisms.

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The term which depicts species as a group of individuals capable of fertile interbreeding but reproductively isolated from one another is called biological species concept.

Species is the lowest level in the hierarchy of classification. The organisms belonging to the same species have almost similar type of characteristics and requirements. The most essential factor for organisms to be in the same species is reproducing compatibility.

Reproducibility is the property that differentiates the biotic factors from the abiotic ones. Reproduction is the mating between tow organisms to give rise to offspring. If an organism can reproduce and produce fertile offspring, it is said to be biotic.

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Answer:

12345678910

Explanation:

trust me brooo

Step 1.

Write down the experiment data.

- tube containing water;

- alodea (photosynthetic organism);

- 10 g of sodium bicarbonate;

- light source.

Step 2.

Why bubbles are formed on the leaves of the alodea?

The experiment have all the condictions for photosynthesis, since it provides: water (that is in the tube), CO2 (because of the dissolved sodium bicarbonate), light (because of the string light source). Therefore the most ogical explanation for Alice experiment results is: the bubbles formed as the elodea plant releases oxygen from the elodea leaves, that because with all the elements in the experiment the plant can do a normal photosynthetic process that way realing oxygen in the tube and forming bubbles of "air".

All three of these features provide evidence for the bacterial origin of chloroplasts. So, option 4 is accurate.

The similar organization of photosynthetic membranes is observed in both chloroplasts and photosynthetic bacteria. Both possess thylakoid membranes where the photosynthetic pigments are located, allowing for the absorption of light energy and the generation of ATP through photosynthesis.

The use of two linked photosystems to capture electrons from water is another shared characteristic between chloroplasts and photosynthetic bacteria. Both utilize photosystems (Photosystem I and Photosystem II) to initiate the electron transport chain and generate ATP and reducing power for the synthesis of organic molecules.

Similarities in the DNA sequence of the chloroplast chromosome and bacterial chromosome provide strong evidence for the bacterial origin of chloroplasts. Comparative studies have revealed significant homology between certain genes in chloroplast DNA and bacterial DNA, indicating a common ancestry.

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Answer:

1. P

2.P

3.R

4.R

.5.R

6.B

7.R

8..P

9.P

10..P

11.R

12.P

13.P

14.R

15.R

16.N

17.N

18.P

19.R

20.B

21. R

Explanation:

Photosynthesis is a process in which carbondioxide gas react with oxygen in the presence of solar radiation produces oxygen and glucose. oxygen is released in the atmosphere while glucose s stored in different part of plant body while on the other hand in respiration, glucose is broken down in the presence of oxygen produces carbondioxide, water and energy in the form of ATP.

Answer:

D. can spill during transport and disrupt ecosystems

Explanation:

The correct option would be "D. can spill during transport and disrupt ecosystems" as it is not a risk of renewable energy sources, as renewable energy sources such as solar, wind, and hydroelectric power do not involve transport of fuels and do not have the risk of spills.

Based on Mary's observation that the five similar plants she planted in the same soil grew more slowly each year, a hypothesis could be that the soil's nutrient content became progressively depleted over time.

The hypothesis suggests that the plants' growth rate decreased because the soil lacked sufficient nutrients necessary for optimal growth.

Over the years, as the plants extracted nutrients from the soil, they were not replenished adequately, leading to a gradual decline in nutrient availability. This nutrient depletion hypothesis assumes that the soil's initial nutrient composition was sufficient to support the plants' growth but became insufficient over time.

To test this hypothesis, Mary could conduct soil tests to measure nutrient levels, both initially and after each year of growth. Comparing nutrient concentrations with the growth rates of the plants would provide evidence to support or refute the hypothesis. Mary could consider other factors such as soil pH, water availability, or pest infestations, which could also contribute to the observed decrease in plant growth rate over time.

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Answer:

Coral reefs are underwater structures formed by the accumulation and growth of coral organisms. Coral reefs are known for their high levels of biodiversity, with a vast array of organisms inhabiting the reefs, including fish, invertebrates, and algae. Coral reefs are found in warm, shallow waters, generally in tropical and subtropical regions.

The formation of coral reefs requires specific environmental conditions. Coral reefs typically require clear, warm waters with a temperature range of 20-30°C. These waters must also have a stable salinity and pH level. Coral reefs also require sunlight, which provides energy for photosynthesis, as well as a hard substrate on which to grow.

The relationship between coral and algae is essential for the formation and maintenance of coral reefs. Coral provides shelter and nutrients to the algae, while the algae provide the coral with food and oxygen through photosynthesis. This symbiotic relationship, known as mutualism, is critical to the growth and survival of coral reefs.

It is unlikely that a coral reef would form near the mouth of a major river. Rivers often carry large amounts of sediment and nutrients, which can reduce water clarity and quality. High levels of sediment can also smother and kill coral, while excessive nutrients can cause harmful algal blooms, leading to oxygen depletion and coral death. Additionally, the fluctuating salinity levels near the mouth of a river may not be conducive to the growth and survival of coral. Therefore, the conditions necessary for the formation of coral reefs are usually not present near the mouths of major rivers

Recombination rates for two genes separated buy 10 map units are 10%. True—1% of two genes recombining is represented by one map unit.

Your DNA is what builds and keeps up your human structure. Genes are parts in your DNA that are responsible for your unique physical characteristics.

A little DNA segment called a gene. Millions of little molecules known as bases make up DNA. A, C, T, & G are the four distinct chemical kinds. A gene is a sequence of DNA composed of an As, Cs, Ts, and Gs sequence. Every of your cells has around 20,000 of your genes due to how little they are.

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False: Viruses are non-living agents as they require a host cell to complete their life cycle whereas microbes can live in water, soil and air; thus, they cannot be classified under and classification system.

Microbes are tiny living things that are found all around us and are too small to be seen by the eye. They live in water, soil, and in the air. The human body is home to millions of these microbes too, also called microorganisms.

Some microbes make us sick, others are important for our health. The most common types are bacteria, viruses and fungi. There are also microbes called protozoa. These are tiny living things that are responsible for diseases such as toxoplasmosis and malaria.

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During internal and external respiration, gases move by diffusion. The correct answer is option(a).

External respiration is the exchange of smoke accompanying the extrinsic atmosphere and happens in the alveoli of the lungs. Internal breathing is the exchange of vapor accompanying the surroundings and happens in the tissues. The real exchange of smoke happens on account of simple spread.

Diffusion is the process by which vapor moves from a region of the press to depressed pressure. This involves all along - Internal respiration - which is the campaign in the internal tissues between containers and capillaries, and - External respiration - when smoke is replaced between the alveoli and body part capillaries.

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